'Highwayman' definitions:

Definition of 'highwayman'

(from WordNet)
noun
A holdup man who stops a vehicle and steals from it [syn: highjacker, highwayman, hijacker, road agent]

Definition of 'Highwayman'

From: GCIDE
  • Highwayman \High"way`man\, n.; pl. Highwaymen. One who robs on the public road; a highway robber. [1913 Webster]