1. not broadcast on television or radio
2. not exposed to fresh air; stuffy or poorly ventilated

Examples

• The controversial episode remained unaired for several months.
• Several unaired scenes were included in the DVD release.
• The network decided to keep the pilot unaired.
• The basement felt unaired and musty after being closed up all winter.
• She opened the windows to freshen the unaired room.
• The unaired footage revealed behind-the-scenes drama.
• His unaired grievances finally came to light.