threshold

/ˈθɹeʃ(h)əʊld/noun

The strip at the bottom of a doorway that you step over when entering a room or building.

Example sentences

“She paused for a moment before stepping over the threshold.”
“The groom carried his bride across the threshold of their new home.”

Mostly figurative now: 'on the threshold of a new era', 'a high pain threshold', 'the tax threshold'.

Related words

banisterThe rail you hold onto along the edge of a set of stairs.doormatA rough mat placed outside a door where people can wipe the dirt off their shoes.railingA barrier made of horizontal bars held up by posts, used along stairs, balconies, or fences.doorbellA button or device beside a door that visitors press or ring to let people inside know they have arrived.skylightA window set into a roof or ceiling that lets daylight into a room.shutterOne of a pair of hinged panels, usually wooden, fixed beside a window and closed to block light or protect the glass.