in heat

(redirected from go into heat)

*in heat

in a period of sexual excitement; in estrus. (Estrus is the period of time in which females are most willing to breed. This expression is usually used for animals. It has been used for humans in a joking sense. *Typically: be ~; get [into] ~; go [into] ~.) Our dog is in heat. She goes into heat every year at this time.
See also: heat

in heat

In a state of sexual excitement immediately preceding ovulation. For example, Our cat's in heat so we have to keep her inside. This expression applies to most female mammals and indicates the period when the animal is fertile and most receptive to mating. [Mid-1700s]
See also: heat
References in periodicals archive ?
Male hanuman langurs court females by killing cubs from former liaisons, which cause her to go into heat.
Non-spayed outdoor female cats will go into 'heat' or estrus seasonally in the spring and summer, and may go into heat several times during the season.