a piece of equipment that you use to help you do a job, esp. something that you use with your hands to make or repair something: The only tools you need for this job are a hammer and a screwdriver. A tool is also anything that helps you to do something you want to do:

Tool definition: an implement, especially one held in the hand, as a hammer, saw, or file, for performing or facilitating mechanical operations..

TOOL meaning: 1 : something (such as a hammer, saw, shovel, etc.) that you hold in your hand and use for a particular task; 2 : something that is used to do a job or activity