silentsignal
nounUK /ˈsaɪlənt ˈsɪɡnəl/
US /ˈsaɪlənt ˈsɪɡnəl/
A silent signal is a quiet sign that tells you something without any sound.
The teacher gave a silent signal with her hand, and the class got quiet.
RELATED WORDS
OTHER MEANINGS
2. A hidden or secret message sent without being noticed.
The spies used a silent signal to meet at the park.
3. A light or movement that gives information without noise.
The blinking light was a silent signal that the door was locked.
4. A way of showing feelings with your face or body instead of words.
He gave a silent signal with a smile to show he was happy.