on

on ► PREPOSITION 1) in contact with and supported by (a surface). 2) on to. 3) in the possession of. 4) forming a distinctive part of the surface of. 5) about; concerning. 6) as a member of (a committee, jury, etc.). 7) having (the thing mentioned) as a target, aim, or focus. 8) stored in or broadcast by. 9) in the course of or while travelling in. 10) indicating the day or time when something takes place. 11) engaged in. 12) regularly taking (a drug or medicine). 13) paid for by. 14) added to.

► ADVERB 1) in contact with and supported by a surface. 2) (of clothing) being worn. 3) further forward; with continued movement or action. 4) taking place or being presented. 5) (of an electrical appliance or power supply) functioning. 6) on duty or on stage.

► NOUN (also on side) Cricket ▪ the leg side.

● be on about — Cf. ↑be on about

● be on at — Cf. ↑be on at

● be on to — Cf. ↑be on to

● on and on — Cf. ↑on and on

● on to — Cf. ↑on to

ORIGIN Old English.