in the military art, is the putting two ranks or files of soldiers into one. Thus, when the word of command is, double your ranks, the second, fourth, and sixth ranks march into the first, third, and fifth, so that the fix ranks are reduced to three, and the intervals between the ranks become double what they were before.

among hunters, who say that a hare doubles, when he keeps in plain fields, and winds about to deceive the hounds.

in the menage, a term used of a horse, who is said to double his reins, when he leaps several times together, to throw his rider; thus we say, the ramongue doubles his reins, and makes pontlevis.

DOUBLING a cape or point, in navigation, signifies the coming up with it, passing by it, and leaving it behind the ship.