To apply a postmark on.

(biology) referring to an RNA strand that can serve directly as messenger RNA and be transcribed into DNA.

A position for sexual intercourse in which the man and woman face each other, with the man on top.

(advertising) One of four archetypal dramatic structures of commercials, characterized by an emotionally neutral beginning with an enormous leap in positive emotions generated by seeing the branded product in use.

A forged stamp intended to defraud the post office, rather than defrauding stamp collectors.

(grammar) A determiner used to demonstrate the possession of the thing referenced by the following noun; in English, they include my, his, her, our, your, its and their.

The charge for posting an item. / The postage stamp, or similar token, affixed to an item of post as evidence of payment.

(idiomatic) A male exemplar of some trait.

(idiomatic) A female exemplar of some trait.

(chiefly Canada, US, idiomatic) One who is a prototypical or quintessential example of something.