Definition of home alone in US English:

home alone

adverb

North American
  • At home alone; especially (of a child) left at home unsupervised during parental absence.

adjective

North American
  • Designating a person (especially a child) who is at home by himself or herself; relating to a situation in which a person is at home alone.

Origin

Late 19th century; earliest use found in The New York Times. From home + alone.

Pronunciation

home alone

/ˌhəʊm əˈləʊn/