1. the numbers from 1,000 to 9,999; the plural of thousand
Usage: used as a plural noun
2. very large numbers of people or things; many thousands
Usage: informal; used to emphasize large quantities

Examples

• The population grew from hundreds to thousands over the decade.
• Thousands of people attended the concert.
• The charity raised thousands of dollars for the cause.
• Thousands of birds migrate south each winter.
• The company employs thousands of workers worldwide.
• Thousands of students graduate each year.
• The museum displays thousands of artifacts.