Long, thin pieces of wood or metal that are used to support something, like stairs or a ship's hull.
Stringers are important for making things strong and safe.
Examples:
The stairs have strong stringers underneath.
The ship's hull is supported by metal stringers.
We need to replace the old wooden stringers with new ones.
The stringers help the stairs not to fall down.
The stringers are like the bones of the stairs, keeping them strong.
The stringers are like the legs of the stairs, holding them up.