B1noun1K

Signal

UK /["/ˈsɪɡnəl/"]/US /["/ˈsɪɡnəl/"]/

Definition

a movement or sound that you make to give somebody information, instructions, a warning, etc.

In simple words: A sign or message that tells someone something.

Examples

  • The radio signal was weak, making it difficult to hear the news.
  • He used a hand signal to direct the cars at the intersection.
  • The scientist noticed a signal indicating a possible earthquake.
  • When you see the green light, it’s a signal to go ahead.
  • The team's victory was a signal of their hard work and dedication.
  • Crows often signal danger to each other with loud caws.
  • She received a signal from her friends to join them.
  • In this context, the signal refers to an important message.
  • He knew it was time to leave when he saw the signal from the boss.

Usage notes

Commonly used in both formal and informal contexts. In technical settings, it may refer to electromagnetic signals or communication. Avoid in very casual conversations.

Grammar pattern

signal + object

Memory hint

Think of a 'sign' in a game, like a coach signaling for a play.

Collocations

  • clear
  • unmistakable
  • agreed
  • give (somebody)
  • make
  • send
  • come from something
  • indicate something
  • at a signal
  • on a signal
  • signal for
  • railroad
  • railway
  • traffic
  • operate
  • be on red/​green
  • be red/​green
  • fail
  • box
  • failure
  • faint
  • weak
  • strong
  • carry
  • pass
  • relay
  • travel
  • fade
  • intensity
  • strength
  • signal from
  • signal to
  • clear
  • unmistakable
  • agreed
  • give (somebody)
  • make
  • send
  • come from something
  • indicate something
  • at a signal
  • on a signal
  • signal for

Synonyms

  • sign

Antonyms

  • noise
  • silence

Common mistakes

  • Confused with 'sign' — remember 'signal' is an act of sending a message.
  • Using the wrong preposition, e.g., 'signal to' instead of 'signal for'.
  • Mispronunciation, often saying 'sig-nal' instead of 'sig-nuhl'.