Select a subject
Search for a definition...
Back to the Glossary

Looking for a quick definition?

We’ve got loads of key subject terms in our subject glossaries. There are three ways of finding what you are looking for:

  • First click on the letters of the alphabet to browse for terms.
  • Select a subject from the drop-down menu above to filter the terms by Subject.
  • Or lastly, type the term you are looking for into the search box.


Here are some examples of the kinds of definitions you’ll find on this page.


an infection of the skin, caused by a parasitic fungus. It causes cracked, inflamed and itchy...


the total amount of carbon dioxide produced by individuals, nations or organisations as a result...

a unit of meter or unit of rhythm. See meter and rhythm.

a note that explains, gives examples of, references or elaborates something that appears in the...