first time

• (Received Pronunciation) IPA^(key): /fɜːst taɪm/
• (General American) IPA^(key): /fɝst taɪm/

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first time (plural first times)

1. One's first instance of sexual intercourse.

   Do you remember your first time?

2. Used other than figuratively or idiomatically: see first,‎ time.
   • 1971, Johnson, Lyndon, “The Beginning”, in The Vantage Point‎, Holt, Reinhart & Winston, →ISBN, LCCN 74-102146, OCLC 1067880747, page 11:

     Just a minute or so before we left — it must have been about 1:30 p.m. — Assistant Press Secretary Malcolm Kilduff came into the room and addressed me as "Mr. President." This was the first time anyone had called me that and I must have looked startled; I certainly felt strange.