much of a muchness

WordReference Random House Unabridged Dictionary of American English © 2025

much•ness  (much′nis), n. 

1. [Archaic.] greatness, as in quantity, measure, or degree.
2. Idioms much of a muchness:
   • much the same;
     very much alike.
   • extravagance;
     excess.

• Middle English mochenesse. See much, -ness 1350–1400

Collins Concise English Dictionary © HarperCollins Publishers::

muchness / ˈmʌtʃnɪs/ noun

1. magnitude
2. much of a muchness ⇒ very similar