stationary Stationary means not moving. A stationary bike is the kind you find in the gym –– you pedal and pedal, but you just don’t go anywhere. stationery If your grandmother gives you a set of stationery as a birthday present, it might be a subtle hint to write her a thank you note. Stationery is a set of writing paper that comes with envelopes. [Source.](https://www.vocabulary.com/articles/chooseyourwords/stationary-stationery/)