- noun an international standard unit of length, approximately equivalent to 39.37 inches.
- An alternate spelling of meter (1).
- The normal measure of length approximately 3 feet 3 inches, abbreviated m, divided into centimetres (cm) (100 per metre) and millimetres (mm) (1000 per metre). One inch is approximately 2.5 cm, one foot 30 cm and one yard 91 cm.
- noun a measure of length equalling 3.4 feet