noun
roomie
noun
1
An informal short form of "roommate."
"My roomie left dishes in the sink again."
How to Use Roomie
Learner’s notesIn plain EnglishA casual word for roommate, mostly used in speech among friends.
When to use it
Informal — fine in conversation and texts, but "roommate" is the neutral, standard term for formal writing.
Word Forms
roomies plural
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Etymology
A casual shortening of "roommate" with the informal -ie ending.