/ ˈɪntəkɔːs; NAmE ˈɪntərkɔːrs/ noun [ U ]
1.
= sexual intercourse :
The prosecution stated that intercourse had occurred on several occasions.
anal intercourse
2.
( old-fashioned ) communication between people, countries, etc. :
the importance of social intercourse between different age groups
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WORD ORIGIN
late Middle English : from Old French entrecours exchange, commerce, from Latin intercursus , from intercurrere intervene, from inter- between + currere run. The specifically sexual use arose in the late 18th cent.