1) Architectural element 2) Balusters 3) Balustrade 4) Bannister 5) Barrier 6) Flight safety enhancement 7) Handrail 8) It can be found step by step 9) It may be slid on 10) Item that may be slid down 11) Kids slide down it 12) Rail 13) Rail beside a staircase 14) Railing 15) Slide for a kid 16) Something to slide on 1) Balusters 2) Balustrade 3) Bar 4) Barrier 5) Handrail 6) Rail 7) Railing 
• (n.) A stringed musical instrument having a head and neck like the guitar, and its body like a tambourine. It has five strings, and is played with the fingers and hands.
A banister is a balustrade used on staircases as a handrail to increase safety.
Ban'is·ter noun [ A corruption of baluster .] A baluster; ( plural ) the balustrade of a staircase. « He struggled to ascend the pulpit stairs, holding hard on the banisters . Sir W. Scott. »