Auto Definition & Meaning – Merriam-Webster auto 1 of 3 noun au· to ˈȯ- (ˌ)tō ˈä- plural autos : automobile auto 2 of 3 adjective : automatic auto- 3 of 3 combining form see aut- Synonyms Noun automobile bus car horseless carriage machine motor motor vehicle motorcar wheels [ slang] See all Synonyms & Antonyms in Thesaurus Example Sentences

https://www.merriam-webster.com/dictionary/auto