WordReference Random House Unabridged Dictionary of American English © 2017
archi-, 
  1. a combining form with the general sense "first, principal,'' that is prefixed to nouns denoting things that are earliest, most basic, or bottommost (archiblast;
    archiphoneme;
    architrave
    );
    or denoting individuals who direct or have authority over others of their class, usually named by the base noun (archimandrite;
    architect
    ).
Also,[esp. before a vowel,] arch-. Cf.  arch- 1,  arche-. 
  • Greek, combining form akin to arché̄ beginning, árchos leader, árchein to be the first, command


Collins Concise English Dictionary © HarperCollins Publishers::

archi- combining form
  1. a variant of arch-



arch-, archi- combining form
  1. chief; principal; of highest rank
  2. eminent above all others of the same kind; extreme
Etymology: ultimately from Greek arkhi-, from arkhein to rule



'archi-' also found in these entries:
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