■ prepositi~
1》 physically in c~tact with and supported by (a surface).
↘located somewhere in the general surface area of (a place).
↘~ to.
↘in the possessi~ of.
2》 forming a distinctive or marked part of the surface of.
3》 about; c~cerning.
↘having (something) as a basis.
4》 as a member of (a committee, jury, etc.).
5》 having (something) as a target, aim, or focus.
6》 having (something) as a medium for transmitting or storing informati~.
↘being broadcast by (a radio or televisi~ channel).
7》 in the course of (a journey).
↘while travelling in (a public service vehicle).
8》 indicating the day or part of a day during which an event takes place.
↘at the time of.
9》 engaged in.
10》 regularly taking (a drug or medicine).
11》 paid for by.
12》 added to.
■ adverb
1》 physically in c~tact with and supported by a surface.
↘(of clothing) being worn by a pers~.
2》 indicating c~tinuati~ of a movement or acti~.
↘further forward; in an advanced state.
3》 (of an event) taking place or being presented.
↘due to take place as planned.
4》 (of an electrical appliance or power supply) functi~ing.
5》 (of an actor) ~ stage.
↘(of an employee) ~ duty.
■ noun (also ~ side ) Cricket the leg side.
Phrases
be ~ about Brit. informal talk about tediously and at length.
be ~ at Brit. informal nag or grumble at.
be ~ to informal
1》 be close to uncovering an illegal or undesirable activity engaged in by (some~e).
2》 ( be ~ to something ) have an idea that is likely to lead to an important discovery.
~ and ~ c~tinually; at tedious length.
~ to moving to a locati~ ~ the surface of (something) or aboard (a public service vehicle).
Origin
OE ~ , an , of Gmc origin.