walk ‧ er /ˈwɔːkə $ ˈwɒːkər/ BrE AmE noun [countable]
1 . especially British English someone who walks for pleasure or exercise ⇨ hiker :
The area is popular with walkers.
climbers and hill-walkers
2 . a fast/slow etc walker someone who walks fast, slowly etc
3 . especially American English a metal frame on wheels that old or sick people use to help them walk SYN zimmer frame British English
4 . a frame on wheels that a baby can sit in and move around using its legs, before it can walk SYN baby walker British English