There are multiple definitions - click on the translation that matches your context.

dilação

substantivo

full

extension

noun

Definitions of extension

a room or rooms added to an existing building

If we don't build an extension we'll need to buy a bigger house.

the action or process of making something larger, especially powers, authority, a road or a building etc

Critics say it's a further extension of power to Brussels and an erosion of the nation state.