<p><strong>Noun</strong></p><ul><li>a positive declaration intended to give confidence: He received assurances of support for the project.</li><li>promise or pledge; guaranty; surety: He gave his assurance that the job would be done.</li><li>Synonyms: oath, warranty</li><li>full confidence; freedom from doubt; certainty: to act in the assurance of success.</li><li>Antonyms: uncertainty</li><li>freedom from timidity; self-confidence; belief in one's abilities: She acted with speed and assurance.</li><li>Antonyms: uncertainty</li><li>presumptuous boldness; impudence.</li><li>Synonyms: cheek, nerve, impertinence, effrontery</li><li>Antonyms: uncertainty</li><li>Chiefly British: insurance.</li></ul>