The series of bodily changes that occur in the female of most mammals from one period of estrus to another. The estrous cycle usually takes place during a specific period known as the breeding season, which ensures that the young are born at a time when the chance of survival is greatest.
ear-to-ear. It's about smiling. Ear-to-ear smile or grin is when you have a very broad and generous smile. Such a smile when each corner of your mouth is by each of your ears. Explain to me why you don't have an ear-to-ear grin right now.
Princeton's WordNet(3.50 / 2 votes)Rate this definition: 1  laugh, laughter(noun) the sound of laughing. 2  laugh(noun) a facial expression characteristic of a person laughing. his face wrinkled in a silent laugh of derision. 3  joke, gag, laugh, jest, jape(verb) a humorous anecdote or remark intended to provoke laughter.