1. the act of drawing a line under text to emphasize it
2. emphasis or stress placed on something important

1. present participle of underline: drawing a line under text or emphasizing something

Examples

• The teacher’s underlining of key terms helped students focus on important concepts.
• Her constant underlining of the deadline showed how urgent the project was.
• The underlining in the textbook made it easy to review main ideas.
• He was underlining important passages as he read the contract.
• The red underlining indicated spelling errors in the document.
• By underlining the risks, she hoped to change their minds.
• The underlining of certain words changed the meaning of the sentence.