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walker

noun

  1. a person or animal that walks; specif., a contestant in a walking race
  2. ☆ a tubular frame on wheels for use by babies who are learning to walk
  3. ☆ a somewhat similar frame used as a support in walking by the lame, convalescents, etc.
  4. treadmill (sense )
  5. a shoe made specifically for use by a person who walks for exercise

See walker in American Heritage Dictionary 4

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