indoors
adv. placeadv. inside a building or under a roof. You use this when you want to stay away from the rain or cold.
adv. into or within a building. Functions as a locative adverb and does not require a following preposition.
We should stay indoors until the rain stops.
The children played indoors all afternoon because the air quality was too poor for outdoor activities.
While the architecture encourages an outdoor lifestyle, the extreme summer heat often forces residents to remain indoors where climate control systems maintain a comfortable temperature.
From in + doors, originally two words, representing earlier within doors.
Typically placed after the verb or at the end of the clause. Unlike 'inside', it is rarely used as a preposition followed by a noun.
We went to indoorsWe went indoorsIndoors is an adverb of place and does not require the preposition 'to' to indicate direction.