adverb
indoors
ihn-DAWZ
adverb
1
Inside a building, rather than outside.
"It started raining, so we headed indoors."
noun
1
The inside of a building or buildings in general.
"She preferred the indoors to the heat of the yard."
How to Use Indoors
Learner’s notesIn plain EnglishInside, not outside — usually describing where someone is or goes.
Easily confused with
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It started raining, so we headed _____.
Etymology
From "in" plus "doors," originally the two-word phrase "within doors."