def‧i‧ni‧tion S3 W2
1 [countable] a phrase or sentence that says exactly what a word, phrase, or idea means [↪ define]:
a dictionary definition
definition of
There are many definitions of the word 'feminism'.
definition of something as something
the definition of God as infinite

by definition

if something has a particular quality by definition, it must have that quality because all things of that type have it:
People say that students are by definition idealistic and impatient.
3 [uncountable] the clear edges, shapes, or sound that something has:
technologies such as high definition television
good muscle definition

Dictionary results for "definition"
Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.