Definitions
1.VerbTo perform a work or labour; to exert power or strength, physical or mechanical; to act."Could someone explain how this meeting operates?; In this town, the garbage removal staff operate between six o'clock at midnight.; The police had inside knowledge of how the gang operated."
2.VerbTo produce an effect.
To produce an appropriate physical effect; to issue in the result designed by nature; especially to take appropriate effect on the human system.
To act or produce an effect on the mind; to exert moral power or influence.
3.VerbTo produce an appropriate physical effect; to issue in the result designed by nature; especially to take appropriate effect on the human system.
4.VerbTo act or produce an effect on the mind; to exert moral power or influence.
5.VerbTo bring about as an effect; to cause.
6.VerbTo perform some manual act upon a human body in a methodical manner, and usually with instruments, with a view to restore soundness or health, as in amputation, lithotomy, etc."The surgeon had to operate on her heart.; I'm being operated tomorrow."
7.VerbTo deal in stocks or any commodity with a view to speculative profits.
8.VerbTo put into, or to continue in, operation or activity; to work."to operate a machine; to operate a system; to operate a casino"