noun
also ban·nis·ter ˈbanə̇stə(r)
( -s )
Etymology: alteration of baluster
1. : a slender vertical post sometimes having a turned or molded outline ; specifically : one of the upright supports of a handrail alongside a staircase — compare baluster
2. oftenoun plural but singular or plural in construction
a. : a handrail (as of a staircase) and its supporting posts
b. : the handrail especially of a staircase
Alice went downstairs, walking with one hand on the banisters — Audrey Barker
3. : one of several upright members, typically split turnings, that support the crest rail of a chair back