Entry 1 sense Webster, 1913 Interception /ĭnˌ-tẽrs-ĕp'-shən/ · In·ter·cep·tion · IPA /ɪntɚˈsɛpʃən/ 01 n. The act of intercepting; as, interception of a letter; interception of the enemy. 1. The act of intercepting; as, interception of a letter; interception of the enemy.