Definition of headways in English:

headways

adverb

historical, rare
  • In a direction parallel to that of the main cleavage of the coal (the cleat).

adjective

historical
  • Designating a passage driven in a direction parallel to that of the main cleavage of the coal (the cleat); of or relating to a headway. Formerly frequently in "headways course".

Origin

Late 17th century (in an earlier sense). From head + -ways.

Pronunciation

headways

/ˈhɛdweɪz/