Read the dictionary definition of tinker. All definitions for this word.
1. small mackerel found nearly worldwide
2. formerly a person (traditionally a Gypsy) who traveled from place to place mending pots and kettles and other metal utensils as a way to earn a living
3. a person who enjoys fixing and experimenting with machines and their parts
4. try to fix or mend
1. Can you tinker with the T.V. set--it's not working right
2. She always fiddles with her van on the weekend
5. do random, unplanned work or activities or spend time idly
1. The old lady is usually mucking about in her little house
6. work as a tinker or tinkerer
