to carry (something) out fully; to put (a plan, idea, etc) completely into effect
to put (a person) to death as a punishment
to make or produce (a work of art, etc), esp by carrying out a design
to do what is required to make (something) legally effective or valid
to play or perform (something, e.g. a musical piece)
in computing, to run (a file, program, etc)
executable adj
execution noun
[Middle English executen from early French executer, back-formation from execution: see execution]