Main Difference
The main difference between Seat and Chair is that the Seat is a object for sitting on and Chair is a piece of furniture for sitting on.
Seat
A seat is a place to sit. The term may encompass additional features, such as back, armrest and head restraint.
Chair
A chair is a piece of furniture with a raised surface supported by legs, commonly used to seat a single person. Chairs are supported most often by four legs and have a back; however, a chair can have three legs or can have a different shape. Chairs are made of a wide variety of materials, ranging from wood to metal to synthetic material (e.g. plastic), and they may be padded or upholstered in various colors and fabrics, either just on the seat (as with some dining room chairs) or on the entire chair. Chairs are used in a number of rooms in homes (e.g. in living rooms, dining rooms, and dens), in schools and offices (with desks), and in various other workplaces.
A chair without a back or arm rests is a stool, or when raised up, a bar stool. A chair with arms is an armchair; one with upholstery, reclining action, and a fold-out footrest is a recliner. A permanently fixed chair in a train or theater is a seat or, in an airplane, airline seat; when riding, it is a saddle or bicycle saddle; and for an automobile, a car seat or infant car seat. With wheels it is a wheelchair; or when hung from above, a swing. An upholstered, padded chair for two people is a ‘loveseat’, while if it is for more than two person it is a couch, sofa, or settee; or if is not upholstered, a bench. A separate footrest for a chair, usually upholstered, is known as an ottoman, hassock, or pouffe.
Seat (noun)
Something to be sat upon.
Seat (noun)
A place in which to sit.
“There are two hundred seats in this classroom.”
Seat (noun)
The horizontal portion of a chair or other furniture designed for sitting.
“He sat on the arm of the chair rather than the seat, which always annoyed his mother.”
“the seat of a saddle”
Seat (noun)
A piece of furniture made for sitting; e.g. a chair, stool or bench; any improvised place for sitting.
“She pulled the seat from under the table to allow him to sit down.”
Seat (noun)
The part of an object or individual (usually the buttocks) directly involved in sitting.
“Instead of saying “sit down”, she said “place your seat on this chair”.”
Seat (noun)
The part of a piece of clothing (usually pants or trousers) covering the buttocks.
“The seat of these trousers is almost worn through.”
Seat (noun)
A location or site.
Seat (noun)
A part or surface on which another part or surface rests.
“The seat of the valve had become corroded.”
Seat (noun)
A membership in an organization, particularly a representative body.
“Our neighbor has a seat at the stock exchange and in congress.”
Seat (noun)
The location of a governing body.
“Washington D.C. is the seat of the U.S. government.”
Seat (noun)
An electoral district, especially for a national legislature.
Seat (noun)
The starting point of a fire.
Seat (noun)
Posture, or way of sitting, on horseback.
Seat (verb)
To put an object into a place where it will rest; to fix; to set firm.
“Be sure to seat the gasket properly before attaching the cover.”
Seat (verb)
To provide with places to sit.
“This classroom seats two hundred students.”
“The waiter seated us and asked what we would like to drink.”
Seat (verb)
To request or direct one or more persons to sit.
“Please seat the audience after the anthem and then introduce the first speaker.”
Seat (verb)
To recognize the standing of a person or persons by providing them with one or more seats which would allow them to participate fully in a meeting or session.
“Only half the delegates from the state were seated at the convention because the state held its primary too early.”
“You have to be a member to be seated at the meeting. Guests are welcome to sit in the visitors section.”
Seat (verb)
To assign the seats of.
“to seat a church”
Seat (verb)
To cause to occupy a post, site, or situation; to station; to establish; to fix; to settle.
Seat (verb)
To rest; to lie down.
Seat (verb)
To settle; to plant with inhabitants.
“to seat a country”
Seat (verb)
To put a seat or bottom in.
“to seat a chair”
Chair (noun)
An item of furniture used to sit on or in comprising a seat, legs, back, and sometimes arm rests, for use by one person. Compare stool, couch, sofa, settee, loveseat and bench.
“All I need to weather a snowstorm is hot coffee, a warm fire, a good book and a comfortable chair.”
Chair (noun)
The seating position of a particular musician in an orchestra.
“My violin teacher used to play first chair with the Boston Pops.”
Chair (noun)
An iron block used on railways to support the rails and secure them to the sleepers, and similar devices.
Chair (noun)
One of two possible conformers of cyclohexane rings (the other being boat), shaped roughly like a chair.
Chair (noun)
A distinguished professorship at a university.
Chair (noun)
A vehicle for one person; either a sedan borne upon poles, or a two-wheeled carriage drawn by one horse; a gig.
Chair (verb)
to act as chairperson at; to preside over
“Bob will chair tomorrow’s meeting.”
Chair (verb)
to carry in a seated position upon one’s shoulders, especially in celebration or victory
Chair (verb)
to award a chair to (a winning poet) at a Welsh eisteddfod
“The poet was chaired at the national Eisteddfod.”
Seat (noun)
a thing made or used for sitting on, such as a chair or stool.
Seat (noun)
the roughly horizontal part of a chair, on which one’s weight rests directly.
Seat (noun)
a sitting place for a passenger in a vehicle or for a member of an audience
“a fairly small theatre with 1,300 seats”
Seat (noun)
a person’s buttocks.
Seat (noun)
the part of a garment that covers the buttocks.
Seat (noun)
a manner of sitting on a horse
“he’s got the worst seat on a horse of anyone I’ve ever seen”
Seat (noun)
a place in an elected legislative or other body
“he lost his seat in the 1997 election”
Seat (noun)
a parliamentary constituency
“a safe Labour seat in the North-East”
Seat (noun)
a principal site or location
“Parliament House was the seat of the Scots Parliament until the Union with England”
Seat (noun)
short for country seat
“Lamport Hall was the seat of the Isham family for over 400 years”
Seat (noun)
a part of a machine that supports or guides another part
“if the valve seat is damaged, it can be recut using a special tool”
Seat (verb)
arrange for (someone) to sit somewhere
“Owen seated his guests in the draughty baronial hall”
Seat (verb)
sit down
“she invited them to be seated”
Seat (verb)
(of a vehicle or building) have seats for (a specified number of people)
“the jet seats up to 175 passengers”
Seat (verb)
fit in position
“upper boulders were simply seated in the interstices below”