undefined
1. [ adjective ] not precisely limited, determined, or distinguished
Synonyms: vague
Examples:

"an undefined term" "undefined authority" "some undefined sense of excitement" "vague feelings of sadness" "a vague uneasiness"

Related terms: defined indefinable indefinite
Similar spelling:   undefiled
  undefinable
  undepicted
  undefended
  undefeated
  undeveloped
  undefendable
  unedifying