Definition: lacking definition or definite content
Usage: nebulous reasons; unfixed as were her general notions of what men ought to be- Jane Austen
Similar words: indefinite
Definition: vague or not clearly defined or stated
Usage: must you be so indefinite?; amorphous blots of color having vague and indefinite edges; he would not answer so indefinite a proposal
Synonyms: unfixed
Definition: not firmly placed or set or fastened
Definition: not fixed in position
Usage: the detached shutter fell on him; he pulled his arm free and ran
Similar words: floating
Definition: (of a part of the body) not firmly connected; movable or out of normal position
Usage: floating ribs are not connected with the sternum; a floating kidney
Similar words: unfirm, unsteady
Definition: not firmly or solidly positioned
Usage: climbing carefully up the unsteady ladder; an unfirm stance