Entry 1 sense Webster, 1913 Immediacy /ĭmˌ-ēd'-ēˌ-əs-ē/ · Im·me·di·a·cy · IPA /ɪˈmiːdi.əsi/ 01 n. The relation of freedom from the interventionof a medium; immediateness. 1. The relation of freedom from the interventionof a medium; immediateness.