Definition of "bobbin" in English

noun

1. A spool or cylinder around which wire is coiled.

   • Ignition coils using a bobbin molded from high-performance polyester withstand open-circuit bench tests to 70kV.

2. In a sewing machine, the small spool that holds the lower thread.

   • Wind the bobbin, place it in the machine, and raise the thread.

3. The little rounded piece of wood at the end of a latch string, which is pulled to raise the latch.

4. (haberdashery) A fine cord or narrow braid.