immensity

UK: /ɪˈmɛnsɪti/ US: (i men′si tē)

WordReference Random House Unabridged Dictionary of American English © 2025

im•men•si•ty  (i men′si tē), n. 

1. vastness;
   enormous extent:
   the immensity of the Roman empire.
2. the state or condition of being immense.

• Latin immēnsitās. See immense, -ity
• late Middle English 1400–50

Collins Concise English Dictionary © HarperCollins Publishers::

immensity / ɪˈmɛnsɪtɪ/ noun ( -ties)

1. the state or quality of being immense; vastness; enormity
2. enormous expanse, distance, or volume
3. a huge amount: an immensity of wealth

WordReference Random House Learner's Dictionary of American English © 2025

im•mense /ɪˈmɛns/   adj. 

1. so large as to be impossible to measure:
   an immense territory.

im•mense•ly, adv.: 

We enjoyed the party immensely.

im•men•si•ty, n. 

[uncountable] the immensity of the galaxy and the universe.

WordReference Random House Unabridged Dictionary of American English © 2025

im•mense  (i mens′), adj. 

1. vast;
   huge;
   very great:
   an immense territory.
2. immeasurable;
   boundless.
3. [Informal.] splendid:
   You did an immense job getting the project started.

• Latin immēnsus, equivalent. to im- im-² + mēnsus past participle of mētīrī to measure
• late Middle English 1400–50

im•mense′ly, adv. 
im•mense′ness, n. 
Synonyms

• 1. extensive. See huge.