1. A mender of brass kettles, pans, and other metal ware. Tailors and tinkers.
2. One skilled in a variety of small mechanical work.
3. A small mortar on the end of a staff.
4. (Science: zoology) A young mackerel about two years old. The chub mackerel.
5. (Science: zoology) The razor-billed auk.
Origin: From Tink, because the tinker's way of proclaiming his trade is to beat a kettle, or because in his work he makes a tinkling noise. Johnson.