1. in a way that involves careful attention or examination
2. at a short distance; near in space or time
3. in a way that shows a strong connection or similarity

Examples

• She watched the experiment closely to record all the changes.
• The detective examined the evidence closely for clues.
• The two houses are built closely together.
• He followed closely behind his guide through the forest.
• The twins work closely with each other on every project.
• Her writing style closely resembles that of her mentor.
• The company closely monitors its competitors’ activities.