A quarter, one of four equal parts of a whole.
The fourth gear of an engine.
A musical interval which spans four degrees of the diatonic scale, for example C to F (C D E F).
The person or thing in the fourth position.
To agree with a proposition or statement after it has already been thirded.
The ordinal form of the number four.
A period of three months or about three months; (financial): quarter.
One of the terms of an academic year in those learning institutions that divide their teaching in three roughly equal terms, each about three months long. Compare semester.