Emily Dickinson Lexicon

EX-ORB'I-TANCE, or EX-ORB'I-TAN-CY, n. [egzorb'itance; L. exorbitans, from ex and orbita, the track of a wheel, orbis, on orb.]

Literally, a going beyond or without the track or usual limit. Hence, enormity; extravagance; a deviation from rule or the ordinary limits of right or propriety; as, the exorbitancies of the tongue, or of deportment. The reverence of my presence may be a curb to your exorbitancies. Dryden.