adj. 1. decreasing; as, steadily declining incomes. Syn. -- down(prenominal). [ WordNet 1.5 ] 2. going from better to worse. Syn. -- deteriorating, failing, regressing, retrograde, retrogressive. [ WordNet 1.5 ] 3. becoming less or smaller; as, declining powers of body and mind. Opposite of increasing. Syn. -- eroding. [ WordNet 1.5 ] 4. drawing to an end; waning; as, his declining years. [ prenominal ] [ WordNet 1.5 ] |