Entry 1 sense Webster, 1913 Dilapidated /dəl-ăp'-əd-ātˌ-ĭd/ · Di·lap·i·da·ted · IPA /dɪˈlæpɪdeɪtəd/ 01 a. Decayed; fallen into partial ruin; injured by bad usage or neglect. 1. Decayed; fallen into partial ruin; injured by bad usage or neglect. “A deserted and dilapidated buildings.” — Cooper.