Math Definitions - Letter M


Definition of Millimetre

Definition of Millimetre

A millimetre is a metric unit of distance that is used to measure objects with small lengths.

Carpenters often take measurements in millimetres.

One metre contains \(1,000\) millimetres.

The abbreviation of millimetre is mm

For example,

  • There are \(10\) mm in one centimetre.
  • A washer is usually \(1\)-\(2\) mm thick.
  • The ruler in the picture shows measurements in millimitres.


The aim of this dictionary is to provide definitions to common mathematical terms. Students learn a new math skill every week at school, sometimes just before they start a new skill, if they want to look at what a specific term means, this is where this dictionary will become handy and a go-to guide for a student.


Year 1 to Year 12 students

Learning Objectives

Learn common math terms starting with letter M

Author: Subject Coach
Added on: 6th Feb 2018

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