Orgasm is the climax of sexual excitement, characterized by intensely pleasurable feelings centered in the genitals and (in men) by ejaculation.
Key characteristics of orgasm include:
1. Physiological changes: rapid heart rate, muscle contractions
2. Psychological experience: intense pleasure and release
3. Gender differences: male orgasm typically involves ejaculation, while female orgasm involves vaginal and uterine contractions
The term "orgasm" can also refer metaphorically to any intense excitement or pleasurable experience.