Tra từ indicator - Từ điển Oxford Advanced Learner 8th

in·di·ca·tor AW [indicator indicators] BrE [ˈɪndɪkeɪtə(r)] NAmE [ˈɪndɪkeɪtər] noun
1. a sign that shows you what sth is like or how a situation is changing
•The economic indicators are better than expected.
•These atmospheric waves are a reliable indicator of weather changes.
2. a device on a machine that shows speed, pressure, etc
•a depth indicator
3. (BrE) (NAmE ˈturn signal) (also informal blink·er NAmE, BrE)a light on a vehicle that flashes to show that the vehicle is going to turn left or right
•Her right-hand indicator was flashing.

See also: ↑blinker ▪ ↑turn signal

Synonyms:
sign
indication • symptom • symbol • indicator • signal
These are all words for an event, action or fact that shows that sth exists, is happening or may happen in the future.
sign • an event, action or fact that shows that sth exists, is happening or may happen in the future: ▪ Headaches may be a sign of stress.
indication • (rather formal) a remark or sign that shows that sth is happening or what sb is thinking or feeling: ▪ They gave no ▪ indication as to ▪ how the work should be done.
sign or indication?
An indication often comes in the form of sth that sb says; a sign is usually sth that happens or sth that sb does.
symptom • a change in your body or mind that shows that you are not healthy; a sign that sth exists, especially sth bad: ▪ Symptoms include a sore throat. ◇ ▪ The rise in inflation was just one symptom of the poor state of the economy.
symbol • a person, object or event that represents a more general quality or situation: ▪ The dove is a universal symbol of peace.
indicator • (rather formal) a sign that shows you what sth is like or how a situation is changing: ▪ the economic indicators
signal • an event, action or fact that shows that sth exists, is happening or may happen in the future: ▪ Chest pains can be a warning signal of heart problems.
sign or signal?
Signal is often used to talk about an event, action or fact that suggests to sb that they should do sth. Sign is not usually used in this way: Reducing prison sentences would send the wrong signs to criminals.
a(n) sign/indication/symptom/symbol/indicator/signal of sth
a(n) sign/indication/symptom/indicator/signal that…
a clear sign/indication/symptom/symbol/indicator/signal
an obvious sign/indication/symptom/symbol/indicator
an early sign/indication/symptom/indicator/signal
an outward sign/indication/symbol
to give a(n) sign/indication/signal

Example Bank:
•Gold prices are often seen as an indicator of inflation.
•It is still difficult to develop indicators for many concepts used in social science.
•Level of education is actually a poor indicator of ability to run a business well.
•She flicked on her indicator light and passed the lorry.
•The stock market is seen as a leading indicator of economic growth.
•These warts can serve as an indicator of other infections.
•an indicator for the presence of minerals
•performance indicators such as language and numeracy skills
•The economic indicators for the end of the year are better than expected.