1. to defeat completely or overpower
2. to affect someone very strongly with intense emotion
3. to give someone too much of something to deal with

Examples

• The army overwhelms the enemy forces with superior numbers.
• Grief overwhelms her after the loss of her pet.
• The amount of homework overwhelms many students.
• Joy overwhelms the graduates at the ceremony.
• The flood overwhelms the small village.
• Too much information overwhelms new employees.
• The tsunami overwhelms the coastal towns.