1. In an official role
   "officially, he is in charge"; "officially responsible" 
2. With official authorization
   - formally

See also: official

Antonym: unofficially

• Chian turpentine
• Chiang Chung-cheng
• Chiang Kai-shek
• Chianti
• chiaroscuro
• chiasm
• chiasma
• chiasma opticum
• chiasmal
• chiasmatic
• chiasmic
• chiasmus
• chibouk
• chic
• Chicago
• chicane
• chicanery
• Chicano
• chicha
• Chichewa
• chichi
• chichipe
• chick
• chick flick
• chickadee