noun
threesome
THREE-suhm
noun
1
A group made up of three people or things.
"The threesome of old friends met up every summer for a road trip."
2
Sexual activity involving three participants.
"The film's plot revolves around the fallout from a threesome gone wrong."
How to Use Threesome
Learner’s notesIn plain EnglishA group of three, though in casual conversation it most often refers to sex involving three people.
When to use it
The sexual sense is the dominant meaning in everyday speech; use context to clarify the neutral "group of three" meaning.
Word Forms
threesomes plural
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The _____ of old friends met up every summer for a road trip.
Etymology
From three plus the suffix -some, meaning "a group of."