(idiomatic) To be fooled; to fall for. / (idiomatic) To be unofficially fostered.

in wine, there is truth

A warning of an imminent explosion in a confined space, especially a grenade or blasting charge. / (slang) A generalized warning that something is about to happen.

(archaic) Contraction of in it. / (Northern England, informal) Contraction of isn't.

(temporal location, idiomatic, informal) In the distant past; especially, at a time fondly remembered.

(idiomatic) In development; in the process of being made or evolving.

Occurring within an establishment, using existing personnel, facilities, and supplies, as opposed to at some external supplier or customer.

Of a number of people walking, or especially marching, synchronously, so that that footfalls occur at the same time.

In operation. / In combat.

(linguistics, anthropology) The style of speech and manners which are to be observed between an Australian aboriginal man and his mother-in-law (i.e. wife's mother). Depending on the particular people, this can go so as far as an entirely separate vocabulary of words.