A screen door is a door made of fine netting which is on the outside of the main door of a house. It is used to keep insects out when the main door is open.
screen door in British English
(skriːn dɔː)
noun
a door frame containing a mesh that is positioned outside another door to keep out insects
She closed the screen door to keep out the mosquitoes.
screen door in American English
an outer door consisting of a frame covered with mesh, as of wire or plastic, used to keep insects out
Examples of 'screen door' in a sentence
screen door
My heart thumped as I suddenly heard the outside screen door slowly creak open.