|1.||a. coming after the third in order, position, time, etc. Often written: 4th|
|b. (as noun): the fourth in succession|
|2.||denoting the fourth forward ratio of a gearbox in motor vehicles|
|a. the interval between one note and another four notes away from it counting inclusively along the diatonic scale|
|b. perfect interval See also diminished one of two notes constituting such an interval in relation to the other|
|4.||the fourth forward ratio of a gearbox in a motor vehicle: he changed into fourth as soon as he had passed me|
|5.||a less common word for quarter|
|6.||after the third person, position, event, etc|
|7.||as the fourth point: linking what follows with the previous statements, as in a speech or argument|
Coming after third, as in order, place, rank, time, or quality.
Being the digit that is next to and on the outermost side of the third digit, as on a foot.