Definition

1. Adjective:
   • Not open; not opening: Describes something that is closed, shut, or sealed, and does not have an opening. It can also describe something that is not in the process of becoming open.

Usage

• The word "nonopening" is a compound adjective formed by adding the prefix "non-" (meaning "not") to the present participle "opening." It is used in formal, technical, or descriptive contexts to specify that an object lacks an opening or is permanently closed.
• It typically modifies a noun directly (e.g., a nonopening door, a nonopening window).

Examples

• Adjective:
  • The safety valve was designed to be completely nonopening under normal pressure.
  • We installed a nonopening window in the basement wall for extra security.
  • The contract specified the use of nonopening panels for the lower section of the facade.

Advanced Usage

• Technical/Engineering Contexts: Often used in specifications to describe components, seals, or barriers that must remain closed.
  • The nonopening seal ensures the container remains airtight during transport.

Variants and Related Words

• Non-opening: A hyphenated variant with the same meaning. Usage may depend on style guides.
• Sealed (adj): Closed securely to prevent access or leakage.
• Fixed (adj): Attached permanently and not designed to open or move (e.g., a fixed window).
• Impenetrable (adj): Impossible to pass through or enter.

Synonyms

• Closed
• Shut
• Sealed
• Imperforate (specifically meaning without holes)

Antonyms

• Opening
• Open
• Apertured
• Perforated

Adjective

1. not open; not opening