Entry 1 sense Webster, 1913 Procrastinator /prək-răs'-tən-ātˌ-ẽr/ · Pro·cras·ti·na·tor · IPA /prəkrˈæstənˌeɪtər/ 01 n. One who procrastinates, or defers the performance of anything. 1. One who procrastinates, or defers the performance of anything.