Definition of omni- in US English:

omni-

combining form

  • 1All; of all things.

    ‘omniscient’
    ‘omnifarious’
    1. 1.1 In all ways or places.
      ‘omnicompetent’
      ‘omnipresent’

Origin

From Latin omnis ‘all’.

Pronunciation

omni-

/ˈɑːmnɪ-/