Definition of Zimmer frame noun from the Oxford Advanced Learner's Dictionary

Zimmer frame

ˈzɪmə freɪm
; ˈzɪmər freɪm
(also informal Zimmer
; ˈzɪmər
(both British English) (North American English walker)
a metal frame that people use to help them to walk, for example people who are old or who have something wrong with their legs