Definitions

1. noun

A person or thing that seals something, such as a liquid or a container.

“The sealer on the bottle made sure the contents remained fresh.”

2. noun

A device or machine used to seal something, such as a rubber seal or a metal sealer.

“The sealer on the door helped to keep the cold air out.”

3. verb

To apply a seal or seal something, such as to seal a document or a container.

“The employee was tasked with sealing the envelopes before mailing them.”