intercourse

n. mutual contact between countries; communication, interaction, social exchange of thoughts or feelings; coitus, copulation, sexual relations

Sexual intercourse or copulation is the union of the sex organs of two sexually reproducing animals. The two entities may be of opposite sexes, or they may be hermaphroditic, as is the case with snails. This is sometimes called just sex, while the term is also colloquially used at times to include oral sex and anal sex.
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Intercourse /in·ter·course/ 1. mutual exchange. 2. sexual i. sexual intercourse 1. coitus. 2. any physical contact between two individuals [more]Intercourse - Community and Resources

Noun
1. communication between individuals
(synonym) social intercourse
(hypernym) intercommunication
(hyponym) communion, sharing
2. the act of sexual procreation between a man and a woman; the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur
(synonym) sexual intercourse, sex act, copulation, coitus, coition, sexual congress, congress, sexual relation, relation, carnal knowledge
(hypernym) sexual activity, sexual practice, sex, sex activity
(hyponym) defloration
(part-meronym) insemination

n. intercourse, mutual contact between countries, interaction