To narrow a sidewalk.
The river narrows up ahead.
To narrow down one's college options.
An example of narrow used as an adjective is the phrase narrow mind, which is someone with little knowledge of the world.
An example of a narrow window is a long window that is not very wide.
A narrow margin of victory.
Narrowed the possibilities down to three.
A narrow mind.
A narrow inspection.
A narrow escape.
A narrow majority.
Origin of narrow
- Middle English narwe from Old English nearu
From American Heritage Dictionary of the English Language, 5th Edition