Definitions

1. comparative adjective

more pleasing or agreeable

“She thought the new restaurant was nicer than the one they used to go to.”

2. adverb

in a nicer or more agreeable manner

“He spoke to her in a nicer tone than before.”

3. noun

a person or thing that is considered to be more pleasing or agreeable

“The nicer of the two options was the one with the park view.”