<p><strong>Adjective</strong></p><ul><li>not likely to be or occur; improbable; marked by doubt</li><li>holding little prospect of success; unpromising; likely to fail: He is an unlikely candidate for reelection</li><li>not ingratiating; objectionable</li></ul><p><strong>Adverb</strong></p><ul><li>in an unlikely way</li></ul>