signal
UK/'signl/US
NGSL 2kIELTSGREB1
Definitions
n.
A sign, sound, or action that sends information or a command.
信号；暗号。
n.
A transmitted wave carrying sound, images, or data.
（电波）信号。
v.
To make a signal; to indicate or make something known.
发信号；示意，表明。
adj.
Notably important; outstanding (formal).
显著的，重大的（正式）。
Root Breakdown
Root-derivedsign (a mark) + -al = 'a thing belonging to a sign.' A signal is a sign actively sent across distance or time — a hand raised, a flare fired, a wave broadcast. Where a sign just sits there meaning something, a signal is conveyed.
Root sign still carries 17 more wordsCommon Collocations
- 1.send a signal发出信号
- 2.mixed signals信号矛盾／态度不明
- 3.signal strength信号强度
- 4.warning signal警告信号
Example Sentences
- 1.
The driver gave a signal before turning left.
- 2.
The phone signal is weak inside the tunnel.
- 3.
Her resignation signaled a deeper crisis in the company.