Bit

1. The cutting iron of a plane.
2. A part of anything, such as may be bitten off or taken into the mouth; a morsel; a bite. Hence: A small piece of anything; a little; a mite.
3. Somewhat; something, but not very great.
4. imp. & p. p. of Bite.
5. Fig.: Anything which curbs or restrains.
6. In the Southern and Southwestern States, a small silver coin (as the real) formerly current; commonly, one worth about 12 1/2 cents; also, the sum of 12 1/2 cents.
7. The part of a key which enters the lock and acts upon the bolt and tumblers.
8. of Bite
9. The part of a bridle, usually of iron, which is inserted in the mouth of a horse, and having appendages to which the reins are fastened.
10. To put a bridle upon; to put the bit in the mouth of.
11. of Bite
12. A tool for boring, of various forms and sizes, usually turned by means of a brace or bitstock. See Bitstock.
13. 3d sing. pr. of Bid, for biddeth.