Definition

Verb (transitive) 1. To enclose something completely, preventing it from escaping or entering: The action of closing or securing something within a container or space using a tight seal, barrier, or method that traps it inside. 2. To preserve or trap a quality, substance, or condition: To confine something (like flavor, moisture, freshness, or air) so that it is retained and protected from external elements.

Usage and Examples

• The primary function of the lid is to seal in the heat and keep the soup warm for hours.
• This special packaging is designed to seal in freshness from the moment it's closed.
• The artist applied a final varnish to seal in the colors and protect the painting.
• We need to seal in the edges of the flooring to prevent water damage.

Advanced Usage

• Metaphorical Use: Can describe trapping an abstract quality or emotion.
  • The solemn ceremony seemed to seal in the grief of the occasion.
• Passive Voice: Commonly used in passive constructions.
  • The flavors are perfectly sealed in during the slow-cooking process.

Variants and Related Words

• Seal (verb): To fasten or close securely.
  • Seal the envelope before mailing it.
• Lock in (verb phrase): A close synonym often used interchangeably with "seal in," especially for qualities.
  • The marinade helps lock in the juices of the meat.

Synonyms

• Enclose
• Confine
• Trap
• Encapsulate
• Preserve (in the context of retaining quality)

Related Phrasal Verbs

• Seal off: To prevent access to an area by closing it completely.
  • Police sealed off the crime scene.
• Seal up: To close something securely, especially openings.
  • We need to seal up the cracks in the wall.

Notes on Meaning

The phrase emphasizes the result of creating an impermeable barrier. The focus is on what is kept inside (the flavor, heat, air) rather than on what is kept out. It often implies a beneficial action for preservation or maintenance.

Verb

1. close with or as if with a tight seal
   • This vacuum pack locks in the flavor!