execution time - 1. the total time required to execute an instruction.the total time required to execute an instruction. 2. the amount of CPU time used by a program. Also, COMPUTE TIME.the amount of CPU time used by a program. Also, COMPUTE TIME. 3. the portion of an instruction cycle in which work is actually performed.the portion of an instruction cycle in which work is actually performed. ; дс тдрлими цюлютдажкию дроемжки аиакиохдйис лидр http://www.harcourt.com/dictionary/def/3/7/3/6/3736200.html;