open to or having several possible meanings or interpretations; equivocal

an ambiguous answer.

Linguistics . (of an expression) exhibiting constructional homonymity; having two or more structural descriptions, as the sequence Flying planes can be dangerous.

of doubtful or uncertain nature; difficult to comprehend, distinguish, or classify

a rock of ambiguous character.

lacking clearness or definiteness; obscure; indistinct

an ambiguous shape; an ambiguous future.

adjective

clear , definite , explicit , lucid

adjective

clear as dishwater , cryptic , doubtful , dubious , enigmatic , enigmatical , equivocal , inconclusive , indefinite , indeterminate , inexplicit , muddy , obscure , opaque , puzzling , questionable , tenebrous , uncertain , unclear , unintelligible , vaguenotes:ambiguous is vague by accident or intent; equivocal is vague by intent , cloudy , nebulous , vague , borderline , chancy , clouded , dubitable , indecisive , problematic , problematical , unsure , delphic , unsettled