(sunnier, sunniest)
1.
When it is sunny, the sun is shining brightly.
The weather was surprisingly warm and sunny...
There is a chance of sunny spells in the West.
= bright
ADJ
2.
Sunny places are brightly lit by the sun.
Most roses like a sunny position in a fairly fertile soil.
ADJ
3.
Someone who has a sunny disposition is usually cheerful and happy.
He was a nice lad-bright and with a sunny disposition...
The staff wear big sunny smiles.
= cheery
ADJ