definition of
rut

[1] #1 rut n. a groove or furrow (especially one in soft earth caused by wheels). wn

[2] #2 rut n. [groove] a settled and monotonous routine that is hard to escape; "they fell into a conversational rut". wn

[3] #3 rut v. be in a state of sexual excitement; of male mammals. wn

[4] #4 rut v. [furrow, groove] hollow out in the form of a furrow or groove; "furrow soil". wn

[5] #5 rut n. [estrus, oestrus, heat] applies to nonhuman mammals: a state or period of heightened sexual arousal and activity. wn