· 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"
Synonym(s): groove
Hypernym(s): routine, modus_operandi
· applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
Synonym(s): estrus, oestrus, heat
Hypernym(s): physical_condition, physiological_state, physiological_condition
· be in a state of sexual excitement; of male mammals
Hypernym(s): be
· hollow out in the form of a furrow or groove; "furrow soil"
Hypernym(s): dig, delve, cut_into, turn_over