Entry 1 sense Webster, 1913 Intentionally /ĭnˌ-tĕn'-shən-əl-ē/ · In·ten·tion·al·ly · IPA /ɪnˈtɛn(t)ʃənəli/ 01 adv. In an intentional manner; with intention; by design; of purpose. 1. In an intentional manner; with intention; by design; of purpose.