What does "spear" mean?

Additional senses

1. 2.A sharp-pointed instrument with barbs, used for stabbing fish and other animals.
2. 3.A shoot, as of grass; a spire.
3. 4.The feather of a horse. See Feather, n., 4.
4. 5.The rod to which the bucket, or plunger, of a pump is attached; a pump rod. Spear foot, the off hind foot of a horse. -- Spear grass. (Bot.) (a) The common reed. See Reed, n., 1. (b) meadow grass. See under Meadow. -- Spear hand, the hand in which a horseman holds a spear; the right hand. Crabb. -- Spear side, the male line of a family. Lowell. -- Spear thistle (Bot.), the common thistle (Cnicus lanceolatus).
5. 6.To pierce with a spear; to kill with a spear; as, to spear a fish.
6. 7.To shoot into a long stem, as some plants. See Spire. Mortimer.