Definitions

1. noun

a person or thing that erodes or wears away

“The river’s er caused significant damage to the nearby coastline.”

2. verb

to wear away or gradually destroy something

“The wind erred the stone monument over time.”

3. suffix

forming nouns denoting a person or thing that performs an action

“A singer, a runner, a teacher”

4. interjection

expression of surprise or alarm

“Oh er!”