Definition of "multitool"

A portable hand tool that combines several individual functions in a single assembly or body; thus:

1. A Swiss Army knife or similar tool.  examples

2. Any of a class of folding or telescoping tools with a plier head as the central implement and with sets of peripheral implements (typically knife blades, screwdrivers, files, saws, can openers, bottle openers, scissors, and so on).  examples

3. Any similar tool with some other central implement (such as shears) or with no central implement, but sharing the themes otherwise.  examples

4. Any of a class of monolithic tools with various holes and edges that act as the multiple implements.  examples

An oscillating power tool that can perform multiple functions with different attachments.  examples