Dictionary definition · rut
noun
- a groove or furrow (especially one in soft earth caused by wheels)
- a settled and monotonous routine that is hard to escape"they fell into a conversational rut"
- applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
verb
- be in a state of sexual excitement; of male mammals
- hollow out in the form of a furrow or groove"furrow soil"
Source: Open English WordNet (CC BY 4.0).