building

Etymology 1

From Middle English byldynge, buyldyng, byldyng, buldynge, buldyng, boldyng, equivalent to build + -ing. Compare also related Middle English bold (“edifice, castle, mansion”), from Old English bold (“building, dwelling, house”).

noun

1. (uncountable) The act or process by which something is built; construction.
   The building of the bridge will be completed in a couple of weeks.
2. (countable) A closed structure with walls and a roof.
   My sister lives in that apartment building.
   One particularly damaging, but often ignored, effect of conflict on education is the proliferation of attacks on schools[…]as children, teachers or school buildings become the targets of attacks. Parents fear sending their children to school. Girls are particularly vulnerable to sexual violence. 2013-07-19, Mark Tran, “Denied an education by war”, in The Guardian Weekly, volume 189, number 6, page 1

Etymology 2

From Middle English beeldynge, equivalent to build + -ing.

verb

1. present participle and gerund of build