verb
-creases; -creased; -creasing
[no obj] :to become smaller in size, amount, number, etc.
[+ obj] :to make (something) smaller in size, amount, number, etc.
noun
plural -creases
the act of becoming smaller or of making something smaller in size, amount, number, etc. [count]
[count] :the amount by which something is made smaller
on the decrease
becoming less in size, amount, number, etc. :decreasing