Definitions

1. adjective

unemotional or showing no feeling or expression; impassive and unresponsive.

“She stood impassive in the face of criticism.”

2. adjective

not easily excited or disturbed.

“He remained impassive in the midst of chaos.”

3. noun

a quality of being unemotional or impassive.

“His impassive nature made it difficult to read his emotions.”