Main Difference
The main difference between Cold and Cooler is that the Cold is a condition or subjective perception of having low temperature and Cooler is a type of insulated box used to keep food or drink cool
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Cold
Cold is the presence of low temperature, especially in the atmosphere. In common usage, cold is often a subjective perception. A lower bound to temperature is absolute zero, defined as 0.00 K on the Kelvin scale, an absolute thermodynamic temperature scale. This corresponds to −273.15 °C on the Celsius scale, −459.67 °F on the Fahrenheit scale, and 0.00 °R on the Rankine scale.
Since temperature relates to the thermal energy held by an object or a sample of matter, which is the kinetic energy of the random motion of the particle constituents of matter, an object will have less thermal energy when it is colder and more when it is hotter. If it were possible to cool a system to absolute zero, all motion of the particles in a sample of matter would cease and they would be at complete rest in this classical sense. The object would be described as having zero thermal energy. Microscopically in the description of quantum mechanics, however, matter still has zero-point energy even at absolute zero, because of the uncertainty principle.
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Cooler
A cooler, portable ice chest, ice box, cool box, chilly bin (in New Zealand), or esky (Australia) is an insulated box used to keep food or drink cool.
Ice cubes are most commonly placed in it to help the contents inside stay cool. Ice packs are sometimes used, as they either contain the melting water inside, or have a gel sealed inside that stays cold longer than plain ice (absorbing heat as it changes phase).
Coolers are often taken on picnics, and on vacation or holiday. Where summers are hot, they may also be used just for getting cold groceries home from the store, such as keeping ice cream from melting in a hot automobile. Even without adding ice, this can be helpful, particularly if the trip home will be lengthy. Some coolers have built-in cupholders in the lid.
They are usually made with interior and exterior shells of plastic, with a hard foam in between. They come in sizes from small personal ones to large family ones with wheels. Disposable ones are made solely from polystyrene foam (such as is a disposable coffee cup) about 2 cm or one inch thick. Most reusable ones have molded-in handles; a few have shoulder straps. The cooler has developed from just a means of keeping beverages cold into a mode of transportation with the ride-on cooler. A thermal bag or cooler bag is very similar in concept, but typically smaller and not rigid.
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Cold (adjective)
Having a low temperature.
“A cold wind whistled through the trees.”
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Cold (adjective)
Causing the air to be cold.
“The forecast is that it will be very cold today.”
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Cold (adjective)
Feeling the sensation of coldness, especially to the point of discomfort.
“She was so cold she was shivering.”
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Cold (adjective)
Unfriendly, emotionally distant or unfeeling.
“She shot me a cold glance before turning her back.”
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Cold (adjective)
Dispassionate, not prejudiced or partisan, impartial.
“Let’s look at this tomorrow with a cold head.”
“He’s a nice guy, but the cold facts say we should fire him.”
“The cold truth is that states rarely undertake military action unless their national interests are at stake.”
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Cold (adjective)
Completely unprepared; without introduction.
“He was assigned cold calls for the first three months.”
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Cold (adjective)
Unconscious or deeply asleep; deprived of the metaphorical heat associated with life or consciousness.
“I knocked him out cold.”
“After one more beer he passed out cold.”
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Cold (adjective)
Perfectly, exactly, completely; by heart.
“Practice your music scales until you know them cold.”
“Try both these maneuvers until you have them cold and can do them in the dark without thinking.”
“Rehearse your lines until you have them down cold.”
“Keep that list in front of you, or memorize it cold.”
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Cold (adjective)
Cornered, done for.
“With that receipt, we have them cold for fraud.”
“Criminal interrogation. Initially they will dream up explanations faster than you could ever do so, but when they become fatigued, often they will acknowledge that you have them cold.”
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Cold (adjective)
Not pungent or acrid.
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Cold (adjective)
Unexciting; dull; uninteresting.
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Cold (adjective)
Affecting the sense of smell (as of hunting dogs) only feebly; having lost its odour.
“a cold scent”
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Cold (adjective)
Not sensitive; not acute.
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Cold (adjective)
Distant; said, in the game of hunting for some object, of a seeker remote from the thing concealed. Compare warm and hot.
“You’re cold … getting warmer … hot! You’ve found it!”
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Cold (adjective)
Having a bluish effect; not warm in colour.
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Cold (adjective)
Rarely used or accessed, and thus able to be relegated to slower storage.
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Cold (noun)
A condition of low temperature.
“Come in, out of the cold.”
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Cold (noun)
A common, usually harmless, viral illness, usually with congestion of the nasal passages and sometimes fever.
“I caught a miserable cold and had to stay home for a week.”
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Cold (adverb)
While at low temperature.
“The steel was processed cold.”
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Cold (adverb)
Without preparation.
“The speaker went in cold and floundered for a topic.”
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Cold (adverb)
With finality.
“I knocked him out cold.”
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Cold (adverb)
In a cold, frank, or realistically honest manner.
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Cooler (noun)
Anything which cools.
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Cooler (noun)
An insulated bin or box used with ice or freezer packs to keep food or beverages cold while picnicking or camping.
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Cooler (noun)
A mixed drink, especially one served chilled.
“They served wine coolers in the afternoon.”
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Cooler (noun)
A prison.
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Cooler (noun)
A cold deck.
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Cooler (noun)
A bouncer or doorman.
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Cooler (noun)
a container for keeping food or bottles cool.
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Cooler (noun)
a refrigerator.
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Cooler (noun)
a long drink, especially a mixture of wine, fruit juice, and soda water.
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Cooler (noun)
prison or a prison cell
“the cooler was a dark, claustrophobic room”