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1. (Science: physiology) sexual desire or oestrus of deer, cattle, and various other mammals; heat; also, the period during which the oestrus exists.

2. Roaring, as of waves breaking upon the shore; rote. See Rote.

Origin: F. Rut, OF. Ruit, L. Ruditus a roaring, fr. Rugire to roar; -sp called from the noise made by deer in rutting time.