Comparative form of the adjective "straight"; can also be used attributively (e.g., "straighter road").
Definitions
More straight; having less bend or curvature than something else. Can you draw a straighter line this time?
More honest, direct, or free from deviation in conduct or speech. I expect a straighter answer from you next time.
Comparative form of the adverb "straight".
Definitions
In a more direct, undeviating, or correctly aligned manner. The arrow flew straighter than before.