Definitions

1. noun

one that chirps; especially, a bird

“The chirpier of the flock perched on the branch.”

2. adjective

making a chirping sound or sounds; producing a series of short, high-pitched notes

“The chirpier melody filled the room with joy.”

3. adjective

making something more cheerful or lively; having a lively quality

“The chirpier atmosphere was created with bright decorations.”