An indicator can refer to different things depending on the context. Here are a few common meanings:

1. Economic Indicator: In economics, an indicator is a statistic or data point that provides insight into the overall health and performance of an economy. Examples include GDP growth rate, unemployment rate, and consumer price index.

2. Environmental Indicator: In environmental science, an indicator is a measurable variable that provides information about the state or condition of an ecosystem or environmental process. Examples include air quality index, water quality index, and biodiversity index.

3. Social Indicator: In social sciences, an indicator is a measure that provides information about social phenomena or trends. Examples include poverty rate, literacy rate, and crime rate.

4. Performance Indicator: In business or management, an indicator is a metric or measure used to evaluate the performance or progress of an organization or project. Examples include sales revenue, customer satisfaction score, and project completion rate.

These are just a few examples, and the term "indicator" can have different meanings depending on the specific field or context in which it is used.