riser

1 ENTRIES FOUND:
riser /ˈraɪzɚ/ noun
plural risers
riser
/ˈraɪzɚ/
noun
plural risers
Britannica Dictionary definition of RISER
1 
[count] : a person who gets out of bed after sleeping — used in the phrases early riser and late riser
2 
[count] technical : the upright board between two stairs
3 
risers [plural] US : a set of tall and wide steps for standing or sitting on