1 [countable/uncountable] how large or small something is
Moscow’s subway system is less than half the size of New York’s.
size of: an engine size of 2000 cc
full size (=as large as something will ever be): The plants should reach full size in about four years.
all shapes and sizes (=many different types or forms): Beauty comes in all shapes and sizes.
reduce/increase the size of something: The president has promised to reduce the size of the army.
in size: After six months the tumor had doubled in size.
cut something to size: The boards should be cut to size and nailed into place.
Synonyms and related words