Full Idea
'Matter' is a partial and more confused conception, it seeming to me to be used for the substance and solidity of body, without taking in its extension and figure.
Gist of Idea
I take 'matter' to be a body, excluding its extension in space and its shape
Source
John Locke (Essay Conc Human Understanding (2nd Ed) [1694], 3.10.15)
Book Reference
Locke,John: 'Essay Concerning Human Understanding', ed/tr. Nidditch,P.H. [OUP 1979], p.498
A Reaction
The 'without taking in' I take to mean that matter is an abstraction (of the psychological kind) from the character of physical bodies. Matter does not exist without having an extension and figure.