■ noun
1》 a part, share, or number considered in relation to a whole.
↘the ratio of one thing to another.
↘the correct or pleasing relation of things or between the parts of a whole.
2》 ( ~s ) dimensions; size.
■ verb formal adjust so as to have a particular or suitable relationship to something else.
Phrases
in (or out of ) ~ according (or not according) to a particular relationship in size, amount, or degree.
↘regarded without (or with) exaggeration.
sense of ~ the ability to judge the relative importance of things.
Derivatives
~ed adjective
Origin
ME: from OFr., from L. proportio(n-) , from pro portione 'in respect of (its or a person's) share'.