noun / verb
seal
A secured closure that protects contents from interference.
The seal on this bottle keeps the contents fresh.
Etymology
Latin sigillum means a small sign or stamped mark. A closure bearing such a mark showed whether it had been disturbed, and seal broadened to the secured closure itself.
More examples
- Do not use the medicine if the seal is broken.
- Seal the envelope before you mail it.
- We sealed the jars tightly to prevent leaks.
Forms
seal · seals · sealed · sealing
sealant noun — Material used to close gaps against leakage.