Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

CIO

abbreviation

Definition of CIO

  1. chief information officer




Seen and Heard

What made you want to look up CIO? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a talk on a religious or moral theme

Get Word of the Day daily email!