From (with)in +‎ door, first attested 1711.^[1][2]

• (Received Pronunciation) IPA^(key): /ˈɪndɔː/

• Audio (Southern England):

  (file)

• (General American) IPA^(key): /ˈɪndoɹ/
• Hyphenation: in‧door

indoor (not comparable)

1. Situated in, or designed to be used in, or carried on within, the interior of a building.

   Antonym: outdoor

   These fireworks are not for indoor use!

• → Italian: indoor

• Doiron

Borrowed from English indoor.

• IPA^(key): /inˈdɔr/, /inˈdor/^[1]
• Rhymes: -ɔr, -or

indoor (invariable)

1. indoor (sport)

• indoor in Treccani.it – Vocabolario Treccani on line, Istituto dell'Enciclopedia Italiana

• Nordio, Rodinò, dorino, indoro, indorò, ordino, ordinò, ridono, ridonò, rodino

Unadapted borrowing from English indoor.

indoor m or f or n (indeclinable)

1. indoor

Unadapted borrowing from English indoor.

• IPA^(key): /inˈdoɾ/ [ĩn̪ˈd̪oɾ]
• Rhymes: -oɾ

indoor (invariable)

1. indoor

According to Royal Spanish Academy (RAE) prescriptions, unadapted foreign words should be written in italics in a text printed in roman type, and vice versa, and in quotation marks in a manuscript text or when italics are not available. In practice, this RAE prescription is not always followed.

• Seco, Manuel; Andrés, Olimpia; Ramos, Gabino (2023), “indoor”, in Diccionario del español actual (in Spanish), third digital edition, Fundación BBVA