1. to eat less food than is needed or healthy

Examples

• Many athletes undereat during training season and lose too much weight.
• She tends to undereat when she’s stressed about exams.
• The doctor warned him not to undereat while recovering from surgery.
• Children who undereat may not grow properly.
• It’s just as unhealthy to undereat as it is to overeat.
• The nutritionist helped her recognize when she was starting to undereat.