Si unit (symbol m) of length, equivalent to 1.093 yards or 39.37 inches. It is defined by scientists as the length of the path traveled by light in a vacuum during a time interval of 1/299,792,458 of a second.
In poetry, the recurring pattern of stressed and unstressed syllables in a line of verse. The unit of meter is a foot. Meter is classified by the number of feet to a line: a minimum of two and a maximum of eight. A line of two feet is a dimeter. They are then named, in order, trimeter, tetrameter, pentameter, hexameter, heptameter, and octameter.Any instrument used for measurement. The term is often compounded with a prefix to denote a specific type of meter: for example, ammeter, voltmeter, flowmeter, or pedometer.(Alternate spelling: metre).
1. The basic unit of length adopted under the System International d'Unites (approximately 1.094 yards); SYN. metre, m.
2. Rhythm as given by division into parts of equal time; SYN. time.
3. (Prosody) The accent in a metrical foot of verse; SYN. measure, beat, cadence.
4. Any of various instruments for measuring a quantity.

In music, the timescale represented by the beat. Meter is regular, whereas rhythm is irregular.
Meter can be simple as in 2/4, 4/8, and so on, where each beat divides into two sub-beats; compound meter as in 6/8, 9/8, 12/16, and so on, consists of sub-beats of “compounded” or aggregated in units of three. The numerical sign for meter is a time signature, of which the upper number represents the number of beats in the bar, the lower number the type of beat, expressed as a fraction of a unit (semibreve). Hence 3/4 is three crotchet (quarter-note) beats to the bar and 6/8 is two beats each of three quavers (eighth notes).

1. To measure with a meter
2. To stamp with a meter indicating the postage