agnostic Meaning, Definition & Usage

  1. noun someone who is doubtful or noncommittal about something
    doubter.
  2. noun a person who claims that they cannot have true knowledge about the existence of God (but does not deny that God might exist)
  3. adjective of or pertaining to an agnostic or agnosticism
  4. adjective uncertain of all claims to knowledge
    agnostical.

WordNet

Ag*nos"tic adjective
Etymology
Gr. priv. + knowing, to know.
Definitions
  1. Professing ignorance; involving no dogmatic; pertaining to or involving agnosticism. -- Ag*nos"tic*al*ly adv.
Ag*nos"tic noun
Definitions
  1. One who professes ignorance, or denies that we have any knowledge, save of phenomena; one who supports agnosticism, neither affirming nor denying the existence of a personal Deity, a future life, etc.

Webster 1913