Entry 3 senses · 3 variants Webster, 1913 Nil /nĭl/ · IPA /nɪl/ v. t. n. & a. n. 01 v. t. Will not. 1. Will not.[Obs.] 02 n. & a. Nothing; of no account; worthless; -- a term often used for canceling, in accounts or bookkeeping. 1. Nothing; of no account; worthless; -- a term often used for canceling, in accounts or bookkeeping. 03 n. A special value for a variable used in certain computer languages to mean no assigned value, to be distinguished from the value zero. 1. A special value for a variable used in certain computer languages to mean no assigned value, to be distinguished from the value zero.(computers)