Definitions

1. adjective

The most pleasant or attractive of its kind, especially because it is warm and welcoming.

“This was the cosiest café I’ve ever been to, with a fireplace and delicious hot chocolate.”

2. superlative form of the adjective ‘cozy’

More pleasant or attractive than all others, especially because it is warm and welcoming.

“This was the cosiest bedroom in the entire house, with a large window and a comfortable bed.”