Made by fastening several layers or sections one on top of the other.
A built-up roof.
Made higher, stronger, larger, etc. by the addition of parts.
Filled with buildings; developed.
A built-up neighborhood.
Having many buildings on it.
A built-up suburb.
The definition of built up is someone or something that has been put onto a pedestal, or that has been made to seem as if it is going to be wonderful or great.
An example of built up expectations are when a child believes his Christmas morning will be perfect.
(UK) (of an area of land) Having street lights and therefore subject to a 30 mph speed limit.
Simple past tense and past participle of build up.