Entry Word: definitive

Function: adjective

Meaning: 1 being the most accurate and apparently thorough <the definitive work on the attack on Pearl Harbor>

Synonyms authoritative

Related Words conclusive, decisive; official; accurate, correct; complete, thorough

2 serving to put an end to all debate or questioning <a definitive answer that put an immediate end to the discussion> — see conclusive 1
3 so clearly expressed as to leave no doubt about the meaning <the insurance companyʼs definitive statement on the types of surgical operations that are covered> — see explicit