1. (

• intercourse ,
• social_intercourse

) communication between individuals ;

2. (

• sexual_intercourse ,
• intercourse ,
• sex_act ,
• copulation ,
• coitus ,
• coition ,
• sexual_congress ,
• sexual_relation ,
• relation ,
• carnal_knowledge

) sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur ;