Main entry: unambiguous
Definition: having or exhibiting a single clearly defined meaning
Usage: As a horror, apartheid...is absolutely unambiguous- Mario Vargas Llosa
Antonyms: ambiguous
Definition: having more than one possible meaning
Main entry: unambiguous, unequivocal, univocal
Definition: admitting of no doubt or misunderstanding; having only one meaning or interpretation and leading to only one conclusion
Usage: unequivocal evidence; took an unequivocal position; an unequivocal success; an unequivocal promise; an unequivocal (or univocal) statement
Antonyms: equivocal, ambiguous
Definition: open to two or more interpretations; or of uncertain nature or significance; or (often) intended to mislead
Antonyms: relative, comparative
Definition: estimated by comparison; not absolute or complete
Antonyms: questionable
Definition: subject to question