Ticker (noun)

1. A machine or device that makes a regular clicking sound, especially one recording transactions on a stock exchange.
2. A symbol or code used to represent a security traded on a stock exchange.
3. An electronic device or software application that displays news headlines, stock prices, or other frequently updated information.

Origin:

Mid 19th century: originally a stock exchange term, from the sound made by a machine that recorded transactions.

Examples:

1. She watched the ticker tape scrolling across the bottom of the TV screen.
2. The ticker symbol for Apple Inc. is AAPL.
3. The stock ticker was flashing red, indicating a decline in the market.
4. The news ticker on the website keeps you updated with the latest headlines.
5. He checked the ticker on his phone to see the latest stock prices.