Open English Wordnet
Nouns
(n)ruta groove or furrow (especially one in soft earth caused by wheels) (n)rut, groovea settled and monotonous routine that is hard to escape“they fell into a conversational rut” (n)estrus, oestrus, heat, rutapplies to nonhuman mammals: a state or period of heightened sexual arousal and activity Verbs
(v)rutbe in a state of sexual excitement; of male mammals (v)furrow, rut, groovehollow out in the form of a furrow or groove“furrow soil”