Definition of trail arms in English:

trail arms

phrase

Military
  • Let a rifle hang balanced in one hand and (in Britain) parallel to the ground.

    • ‘Whenever entering into the tunnel recruit units had to trail arms and sing ‘Anchor’s Aweigh’.’
    • ‘When the order is given to trail arms, from the secure, it is done on that side, and with that hand which holds the rifle.’
    • ‘At twenty yards' distance the soldiers will be ordered to trail arms, advance with shouts, fire at five paces' distance, and charge bayonets.’