To behave in a manner appropriate to one's age. / (imperative, originally US) To behave in a mature manner; to avoid being childish.

(transitive) To rebuke, to reprimand, or to admonish, often in a harsh, angry, direct way. / (transitive) To count (members of a sequence), to enumerate.

In a pleasing state or form.

Damaged due to hard or continued use or exposure until no longer useful or effective. / Exhausted or fatigued from exertion.

(American football) A pass made in a backward direction.

Used other than figuratively or idiomatically: see piece, cake. / (idiomatic) A job, task or other activity that is pleasant – or, by extension, easy or simple.

(countable) A place (building, office, shop, or counter) concerned with the business of delivering letters, post or mail and selling stamps, etc. / (countable) An organisation that delivers letters.

(idiomatic) Talking a lot, especially without saying anything of value or meaning.

(idiomatic) Close behind; pursuing or following closely.

A set of rules dictating acceptable behaviour and decisions in a specified environment.