<p><strong>Adjective</strong></p><ul><li>rarer, rarest.</li><li>coming or occurring far apart in time; unusual; uncommon: His visits are rare occasions.</li><li>a rare disease.</li><li>Synonyms: singular, extraordinary, exceptional.</li><li>Antonyms: common.</li><li>thinly distributed over an area; few and widely separated: Lighthouses are rare on that part of the coast.</li><li>Synonyms: infrequent, sparse.</li><li>Antonyms: frequent.</li><li>having the component parts not closely compacted together; not dense: lightheaded from the rare mountain air.</li><li>rare gases; lightheaded from the rare mountain air.</li><li>unusually great: a rare display of courage.</li><li>unusually excellent; admirable; fine: She showed rare tact in inviting them.</li><li>Synonyms: inimitable, incomparable, choice.</li><li>Antonyms: inferior.</li></ul>