intro-

WordReference Random House Learner's Dictionary of American English © 2026

intro-, 

1. prefix. intro- comes from Latin, where it has the meaning "inside, within'':
   intro- + -duce (= lead) → introduce (= bring inside or within to meet someone);
   intro- + -version (= a turning) → introversion (= a turning inside or within).

Compare intra-.

Collins Concise English Dictionary © HarperCollins Publishers::

intro- prefix

1. in, into, or inward: introvert

Etymology: from Latin intrō towards the inside, inwardly, within

WordReference Random House Unabridged Dictionary of American English © 2026

in•tro  (in′trō), n., pl. -tros. [Informal.]

1. Informal Terms an introduction.
2. Informal Terms the introductory passage of a piece for a jazz or dance band.

• shortening of introduction 1895–1900

intro-, 

1. a prefix, meaning "inwardly,'' "within,'' occurring in loanwords from Latin (introspection);
   occasionally used in the formation of new words (introjection). Cf. intra-.

• Latin, representing intrō (adverb, adverbial) inwardly, within

intro., 

1. introduce.
2. introduced.
3. introducing.
4. introduction.
5. introductory.
Also, introd.