1. A device that connects two pieces of equipment that are not normally compatible, allowing them to work together.
Usage: Usually plural or used in singular form 'adaptor'; common in electronics and computing
2. A person or organism that adjusts or becomes adjusted to new conditions or environments.
Usage: Less common than the device sense; used in biology and general contexts

Examples

• I need to buy USB adaptors to connect my old devices to the new computer.
• The power adaptor converts the outlet voltage to the correct level for the laptop.
• She brought several adaptors on her trip to use her American electronics in Europe.
• The camera came with multiple adaptors for different lens types.
• These adaptors allow you to plug multiple devices into a single outlet.
• He is one of the best adaptors to changing market conditions in the industry.