Compatible means able to work well together or exist together without problems. When two things are compatible, they fit together naturally, like puzzle pieces that connect smoothly.

In technology, compatible devices can work together without issues. A compatible printer connects easily to your computer, and compatible video game controllers work with your gaming system. Software that's compatible with your operating system runs smoothly, while incompatible software might crash or refuse to install.

The word also describes people who get along well. Compatible friends share interests, understand each other, and enjoy spending time together without constant arguments. Two compatible teammates work together smoothly on a project because their working styles mesh well. Being compatible doesn't mean being identical: you might be compatible with a friend who likes different movies but shares your sense of humor and values.

Scientists use compatible to describe things that can mix or combine successfully. Some chemicals are compatible and blend safely, while others react dangerously and must be kept apart.

The opposite is incompatible: things that clash, conflict, or simply won't work together. When something proves incompatible with your needs or circumstances, you might need to find a better match.