imperative mood
Definition - The form a verb takes when it is used to give orders, commands, or instructions.

Example -
Give me that majority government, right now!

Etymology -
The term derives from the Late Latin imperativus, pertaining to a command (from imperare, to command).

Oxford English Dictionary -
Its first citation is from 1530:
"Modes: every parfyte verbe hath vi, the indicatyve, imperatyve [etc.]."
(Jehan Palsgrave, Lesclarcissement de la langue françoyse, Introd. 31 )

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