double-head

double-head (third-person singular simple present double-heads, present participle double-heading, simple past and past participle double-headed)

1. (rail transport) To haul a train with two locomotives at the head end.
   • 1961 June, “Motive Power Miscellany: Southern Region”, in Trains Illustrated, page 380:

     For an excursion organised by the publishers of this journal to Eastleigh and Ashford on April 5, Class T9 4-4-0 No. 30117 and E1 4-4-0 No. 31019 were provided to double-head a special from Charing Cross to Ashford via Maidstone East.

• double-header
• double-heading (noun)

• “double-head”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.