How do you use bicycle as a noun and adjective in a sentence?

The noun 'bicycle' functions as the subject of a sentence or clause, and as the object of a verb or preposition:

The red bicycle was very cool. (subject of the sentence)

I bought a basket for my bicycle. (object of the preposition 'for')

The noun 'bicycle' used as adjective, called an attributive noun:

There is a bicycle lane on the road where I live.

The word 'bicycle' is also a verb:

We often bicycle to the library.