(idiomatic, rhetoric, logic, linguistics) A type of tautology in which an item is explained in terms of the item itself, only put in different (usually more abstract) words.

A short watercraft seating one rider, propelled by a two-ended paddle, designed for surfing waves.

(botany) Short, stiff projections or hairs which give a stem or leaf a rough texture, at least in one direction.

Used to ask a person to wait a moment.