1. gives insufficient weight or importance to something
Usage: third person singular present

1. people or things that weigh less than normal or expected
Usage: plural form

Examples

• The study underweights the impact of social factors on student performance.
• The portfolio manager underweights technology stocks in uncertain markets.
• The doctor identified several underweights in the pediatric ward.
• These underweights require special nutritional support.
• The analyst underweights the company’s growth potential.
• Boxing has different categories for underweights and heavyweights.