1. having difficulty breathing, especially from exertion or excitement
2. filled with eager anticipation or excitement
3. causing excitement or suspense

Examples

• She was breathless after running up the stairs.
• The children waited breathless for the magician to reveal his trick.
• The breathless pace of the thriller kept readers turning pages.
• He arrived breathless at the finish line.
• The audience sat in breathless silence during the performance.
• The breathless excitement of opening night filled the theater.
• After the long hike, we were all breathless but happy.