Having no real basis or justification; unfounded, groundless.

Of acts, etc.: Without cause; for which there is no justifying cause or reason; groundless.

Ungrounded, groundless.

Destitute of foundation, authority, or support; having no real cause or reason; unfounded.

Esp. of a natural force or its results: acting or produced independent of reason or without a reason.

Having no grounds or foundation. Cf. moment, n. 6. Obsolete. rare.

Without foundation, baseless.