signal [ˈsɪgnl̟]

---

¹ signal noun

• an event or act which shows that something exists or that gives information about something : sign —often + of
• something (such as a sound, a movement of part of the body, or an object) that gives information about something or that tells someone to do something
• a piece of equipment with colored lights that is used on railways and roads to tell people when to go, to slow down, or to stop

---

² signal verb

• to be a sign of (something) : to show the existence of (something)
• to make a sound or motion that tells someone something

---

³ signal adjective

• very important or great : significant