As a noun:
* "The engineers spent months refining the prototype before it was ready for testing." (A first model or version of something)
* "She used her grandmother's old recipe as a prototype for her new bakery." (An original or model on which something is based)
* "The prototype for the new smartphone is sleek and user-friendly." (A model that serves as a template for future versions)
As an adjective:
* "This is just a prototype version, the final product will have more features." (Denoting a preliminary version)
* "The prototype design of the car was innovative and attracted a lot of attention." (Describing something based on an initial model)
In a figurative sense:
* "His early short stories served as the prototype for his later novels." (Meaning something that was the original or inspiration for something else)
* "The company's new marketing strategy was a prototype for a new era in advertising." (Meaning something that sets a trend or becomes a model for others)
The specific meaning of "prototype" will depend on the context of the sentence.