D defs.my
Entry 2 senses Webster, 1913

Right-hand

/rīt-hănd'/ · Right·-hand · IPA /raɪthˈænd/
01 a. Situated or being on the right; nearer the right hand than the left; as, the right-hand side, room, or road.
  1. 1.
    Situated or being on the right; nearer the right hand than the left; as, the right-hand side, room, or road.
  2. 2.
    Chiefly relied on; almost indispensable.
    “Mr. Alexander Truncheon, who is their right-hand man in the troop.” Addison.
Phrases & compounds
Right-hand rope — a rope which is laid up and twisted with the sun, that is, in the same direction as plain-laid rope. See Illust. of Cordage.