groundless Meaning, Definition & Usage

  1. adjective satellite without a basis in reason or fact
    baseless; unwarranted; idle; wild; unfounded.
    • baseless gossip
    • the allegations proved groundless
    • idle fears
    • unfounded suspicions
    • unwarranted jealousy

WordNet

Ground"less adjective
Etymology
AS. grundleás bottomless.
Definitions
  1. Without ground or foundation; wanting cause or reason for support; not authorized; false; as, groundless fear; a groundless report or assertion. -- Ground"less*ly, adv. -- Ground"less*ness, n.

Webster 1913