Okla. Stat. tit. 21, § 1439

A. The term "dwelling house" as used in Section 1431 et seq. of this title, includes every house or edifice, any part of which has usually been occupied by any person lodging therein at night, and any structure joined to and immediately connected with such a house or edifice. B. The term "dwelling" as used in Section 1438 of this title includes every house, trailer, vessel, apartment or other premises, any part of which has usually been occupied by a person lodging therein at night and any structure joined to and immediately connected with such house, trailer or apartment.