riser

• Nom désignant une personne qui se lève, notamment du lit; un tuyau vertical dans un bâtiment; ou la partie verticale d'une marche d'escalier.

A noun with multiple meanings: a person who rises, especially from bed; a vertical pipe in a building; or the vertical part of a stair or step.

1. Person who risesB1formal

   A person who gets up from a lying or sitting position, especially from bed.

   Personne qui se lève

   • She is an early riser and enjoys watching the sunrise.
   • He is a late riser and often misses breakfast.
   • My grandfather is an early riser, always up before dawn.

2. B2formaltechnical

   A vertical pipe in a building that carries water, gas, or electrical wiring between floors.

   Colonne montante

   • The plumber installed a new riser for the hot water system.
   • The electrical riser runs from the basement to the top floor.
   • A gas riser supplies fuel to the kitchen on the second floor.

   Synonymesstandpipe

3. Stair componentB2formaltechnical

   The vertical part of a step in a staircase, connecting one tread to the next.

   Contremarche

   • The carpenter measured the height of each riser for the new stairs.
   • The riser of the step was painted white to match the treads.
   • Building codes require a maximum riser height of 7 inches.