(idiomatic) Verbal means of passing on information.

(algebra) The identity x²-y²=(x+y)(x-y), that holds for all real numbers.

Certain rules by which social intercourse is regulated among a social group, and which are founded on a regard for reputation.

(idiomatic, colloquial, UK) Used to terminate unwelcome lines of discussion

(idiomatic, dated) An ideal life of carefree prosperity and luxurious contentment.

A region of calm weather right in the middle of a storm. / (idiomatic) A period of calm in a tumultuous time.

(informal) To develop an amicable relationship (with), especially in a sudden manner during an initial encounter.

(transitive) To cause to explode or come out; to release. / (transitive, idiomatic) To forgive and not punish.

(chemistry) the ratio of the number of ions of a solute to the total number of molecules of that solute in a solution

(law, business) Having the same date.