1. to score or mark a line over (text or a character); to place a macron or overline above a letter or symbol
Usage: typography, linguistics, mathematics
2. to score excessively or beyond what is necessary or appropriate
Usage: informal

Examples

• The typesetter overscores the repeated vowel to indicate a long sound.
• In mathematical notation, the bar that overscores a variable represents its complement.
• She overscores her points in the presentation, making them seem less credible.
• The editor overscores certain passages to emphasize their importance.
• When you overscore your achievements, people may doubt your sincerity.