Definitions:

1. enjoying or affording comforting warmth and shelter especially in a small space adjective
   • a cozy nook near the fire
2. having or fostering a warm or friendly and informal atmosphere adjective
   • had a cozy chat
3. suggesting connivance adjective
   • a cozy arrangement with the police

Synonyms:

• cosy
• informal
• intimate
• snug
• tea cosy
• tea cozy