Definition of "Tool" :

noun: the means whereby some act is accomplished

"Science has given us new tools to fight disease."

noun: an implement used in the practice of a vocation

noun: obscene terms for penis

noun: a person who is controlled by others and is used to perform unpleasant or dishonest tasks for someone else

verb: work with a tool

verb: ride in a car with no particular goal and just for the pleasure of it

"We tooled down the street."

verb: drive

"The convertible tooled down the street."

verb: furnish with tools