-
Action (noun)
Something done so as to accomplish a purpose.
-
Action (noun)
A way of motion or functioning.
“Knead bread with a rocking action.”
-
Action (noun)
Fast-paced activity.
“a movie full of exciting action”
-
Action (noun)
A mechanism; a moving part or assembly.
“a rifle action”
-
Action (noun)
: The mechanism, that is the set of moving mechanical parts, of a keyboard instrument, like a piano, which transfers the motion of the key to the sound-making device.
-
Action (noun)
sexual intercourse.
“She gave him some action.”
-
Action (noun)
The distance separating the strings and the fretboard on the guitar.
-
Action (noun)
Combat.
“He saw some action in the Korean War.”
-
Action (noun)
A charge or other process in a law court (also called lawsuit and actio).
-
Action (noun)
A mapping from a pairing of mathematical objects to one of them, respecting their individual structures. The pairing is typically a Cartesian product or a tensor product. The object that is not part of the output is said to act on the other object. In any given context, action is used as an abbreviation for a more fully named notion, like group action or left group action.
-
Action (noun)
The product of Lagrangian and time.
-
Action (noun)
The event or connected series of events, either real or imaginary, forming the subject of a play, poem, or other composition; the unfolding of the drama of events.
-
Action (noun)
The attitude or position of the several parts of the body as expressive of the sentiment or passion depicted.
-
Action (noun)
spin put on the bowling ball.
-
Action (noun)
A share in the capital stock of a joint-stock company, or in the public funds.
-
Action (interjection)
Demanding or signifying the start of something, usually an act or scene of a theatric performance.
“The director yelled ‘Action!’ before the camera started rolling.”
-
Action (verb)
To act on a request etc, in order to put it into effect.
-
Action (verb)
To initiate a legal action against someone.
-
Reaction (noun)
An action or statement in response to a stimulus or other event
“The announcement of the verdict brought a violent reaction.”
“You were in the courtroom. What is your reaction?”
“When I last tried to eat strawberries I had a terrible allergic reaction.”
-
Reaction (noun)
A transformation in which one or more substances is converted into another by combination or decomposition
“In this reaction, the acid and base will neutralize each other, producing a salt.”
-
Reaction (noun)
Reactionary politics; a period in which reactionary thought or politics is resurgent or dominant.
-
Action (noun)
the fact or process of doing something, typically to achieve an aim
“ending child labour will require action on many levels”
“strike action was threatened”
-
Action (noun)
the way in which something such as a chemical has an effect or influence
“the seeds require the catalytic action of water to release heat”
-
Action (noun)
short for industrial action
“the rank and file want to call the action off”
-
Action (noun)
the events represented in a story or play
“the action is set in a country house”
-
Action (noun)
exciting or notable activity
“the weekend sporting action begins on Saturday”
“people in media want to be where the action is”
-
Action (noun)
used by a film director as a command to begin
“lights, camera, action”
-
Action (noun)
a thing done; an act
“she frequently questioned his actions”
-
Action (noun)
a gesture or movement
“his actions emphasized his words”
-
Action (noun)
the way in which something works or moves
“the weapon has a smooth action”
-
Action (noun)
the mechanism that makes a machine or instrument work
“a piano with an escapement action”
-
Action (noun)
armed conflict
“servicemen listed as missing in action during the war”
-
Action (noun)
a military engagement
“a rearguard action”
-
Action (noun)
legal proceedings; a lawsuit
“a civil action for damages”
-
Action (verb)
take action on; deal with
“your request will be actioned”
-
Reaction (noun)
something done, felt, or thought in response to a situation or event
“prices fell in reaction to intense competition”
“my immediate reaction was one of relief”
-
Reaction (noun)
a person’s ability to respond physically and mentally to external stimuli
“a skilled driver with quick reactions”
-
Reaction (noun)
an adverse physiological response to a substance that has been breathed in, ingested, or touched
“such allergic reactions as hay fever and asthma”
-
Reaction (noun)
a mode of thinking or behaving that is deliberately different from previous modes of thought and behaviour
“the work of these painters was a reaction against Fauvism”
-
Reaction (noun)
opposition to political or social progress or reform
“the institution is under threat from the forces of reaction”
-
Reaction (noun)
a chemical process in which substances act mutually on each other and are changed into different substances, or one substance changes into other substances
“a chemical reaction caused by a build-up of particular sodium salts”
-
Reaction (noun)
an analogous transformation of atomic nuclei or other particles
“reactions between photons and electrically charged atomic particles”
-
Reaction (noun)
a force exerted in opposition to an applied force
“the law of action and reaction”