- The definition of a banister is the long support that runs along the side of a staircase.
An example of a banister is a wooden rail to the side of a staircase that can be held for support.
A woman climbing stairs holding onto the banister.
banister definition by Webster's New World
- Now Rare a baluster
- a handrail held up by balusters, as along a staircase
- the handrail itself
Origin: altered ; from baluster
banister definition by American Heritage Dictionary
- a. A handrail, especially on a staircase.b. Such a handrail together with its supporting structures.
- One of the vertical supports of a handrail; a baluster.
Origin: Variant of baluster.