Auto-
//ˈɔː.tə-// prefix
prefix ·Uncommon ·Advanced level
Definitions
Prefix
- 1 Reflexive, regarding or to oneself. morpheme
"auto- + biography → autobiography"
- 2 Automatic. morpheme
"auto- + focus → autofocus"
- 3 Self-propelled. morpheme
"auto- + cab → autocab"
- 4 Relating to cars or the driving of cars. morpheme
"auto- + cross → autocross"
Synonyms
All synonymsAntonyms
All antonymsExample
More examples"auto- + biography → autobiography"
Etymology
Etymology 1
Learned borrowing from Ancient Greek αὐτο- (auto-, “self-”).
Etymology 2
Clipping of automatic.
Etymology 3
Clipping of automobile (“self-propelled”), itself equivalent to auto- (“self”) + mobile. In later formations influenced by auto (“automobile”).
More for "auto-"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.