Definition

1. Adjective:
   • Not subject to leaks; designed or constructed to prevent the escape or entry of a liquid or gas: Describes an object or container that is sealed effectively so that its contents cannot leak out and external substances cannot leak in.

Usage Examples

• Adjective:
  • This new water bottle is completely leakproof. (This new water bottle does not allow any liquid to escape.)
  • For safety, the chemical must be stored in a leakproof container. (The chemical must be kept in a container that prevents any spills.)
  • The manufacturer guarantees that the seal is leakproof for up to five years. (The maker promises the seal will not fail and allow leaks for five years.)

Advanced Usage

• Technical/Engineering Context: Often used to specify a performance standard for products like fuel tanks, plumbing fixtures, or medical equipment.
  • The submarine's hull must be leakproof at extreme depths.
• Figurative Use (less common): Can describe information security, though "leak-proof" (hyphenated) is more typical in this context.
  • They claimed their communication system was leakproof, but the data was still stolen.

Variants and Related Words

• Leak-proof (Adjective): A hyphenated variant with the same meaning, often used when the term precedes a noun (e.g., a leak-proof bag).
• Leak (Verb/Noun): The core word meaning an accidental escape or the act of escaping.
• Waterproof (Adjective): Impervious to water.
• Airtight (Adjective): Impervious to air or gas.

Synonyms

• Sealed: Closed securely to prevent leakage.
• Impervious: Not allowing fluid to pass through.
• Hermetic: Completely sealed, especially against the escape or entry of air.

Antonyms

• Leaky: Having holes or cracks that allow leaks.
• Porous: Having tiny holes that allow liquids or gases to pass through.

Related Phrases and Compounds

• Leakproof bag: A bag designed to prevent its contents from spilling.
• Leakproof guarantee: A promise from a manufacturer that a product will not leak.

Adjective

1. not subject to leaks