sexual intercourse noun2 •Coitus or genital-genital sexual contact.The yogi hopes to gain the universal feminine of Shakti by giving up sexual intercourse; he offers up his phallus in celibacy. — 1981 •Sexual interaction, usually involving vaginal, anal, or oral penetration, between at least two organisms.Mosher et al (2005), from the NSFG for 2002, reported on the percentage of each age group who had experienced oral sex but not sexual intercourse. — 2009 formssexual intercourses