ＩＲ LinksSentence search for ＩＲSentence search for アイ・アールEdit in JMdict Noun1. information retrieval; IRSee also 情報検索Noun2. investor relationsNoun3. integrated resortSee also 統合型リゾートNoun4. infrared radiation; infraredSee also 赤外線Noun5. isoprene rubberSee also イソプレンゴム Discussions Log in to talk about this word.