1. a title or brief explanation accompanying an illustration, photograph, or diagram
2. text displayed on a screen to show dialogue or narration in films or videos

1. to provide with a caption or title

Examples

• The photo caption identified all the people in the picture.
• She read the caption under the museum exhibit to learn more about the artifact.
• The movie had captions for hearing-impaired viewers.
• Please caption this image before uploading it to the website.
• The newspaper editor asked the photographer to caption all the photos.
• The caption explained what was happening in the scientific diagram.