The act of wandering beyond proper bounds; excessive behavior or speech; the state of having strayed beyond normal limits.
From Medieval Latin 'extravagatio,' derived from 'extravagari' (to wander beyond), with the '-ation' suffix creating a noun describing the action or resulting state.
This noun form of 'extravagate' is mostly historical, but the concept lives on in medical terminology—'extravasation' refers to blood or fluid escaping its proper vessels, literally 'wandering outside' where it should stay.
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