A criminal accomplice. / (informal, humorous) A close associate.

plural of partner in crime

(idiomatic) Something whose sensitivity to adverse conditions makes it a useful early indicator of such conditions; something which warns of the coming of greater danger or trouble by a deterioration in its health or welfare.

present participle of usher in

To show (someone) in: to introduce (someone) to the inside of a place. / To welcome (an occurrence).

past participle of see in

Third-person singular simple present indicative form of see in

Third-person singular simple present indicative form of sit in

At the point of death. / In desperate circumstances.

Alternative spelling of hand in hand