† pole-propn. chiefly GunneryObsolete, a bar for supporting the end of the pole of a carriage when the horses are unhitched.
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1841 Ordnance Man. for Use of Officers (U.S. Army Ordnance Dept.) iii. 36 1 pole-prop socket, fastened by 1 rivet.
1875 E. H. KnightAmer. Mech. Dict. III. 1761/2Pole-prop, a bar for supporting the end of the pole or tongue, especially used for various carriages of the artillery service.