WordReference Random House Learner's Dictionary of American English © 2020
men•tion /ˈmɛnʃən/USA pronunciation   v. 
  1. to refer briefly to;
    speak of: [+ object]Did she mention this to her husband?[+ (that) clause]Did I mention that we're leaving in five minutes?

n. [uncountable]
  1. an incidental reference:The dog barked at the mention of her master's name.
  2. formal recognition for a noteworthy act:to receive honorable mention for her essay.
Idioms
  1. Don't mention it. This phrase is used as a polite answer to someone who has thanked you for your help:"Thanks for everything.'' "--Don't mention it; I was glad to help.''
  2. Idiomsnot to mention, in addition to:They own two houses, not to mention a boat.

See -men-.
WordReference Random House Unabridged Dictionary of American English © 2020
men•tion  (menshən),USA pronunciation v.t. 
  1. to refer briefly to;
    name, specify, or speak of:Don't forget to mention her contribution to the project.
  2. to cite formally for a meritorious act or achievement:He was mentioned in dispatches from the war zone.
  3. Idiomsnot to mention, in addition to;
    without mentioning:We were served a sumptuous entree, not to mention the other courses.

n. 
  1. a direct or incidental reference;
    a mentioning:to make mention of a place.
  2. formal recognition for a meritorious act or achievement:Her entry in the science competition received a special mention.
mention•a•ble, adj. 
mention•er, n. 
  • Latin, as above
  • Anglo-French
  • Latin mentiōn- (stem of mentiō) a calling to mind, a touching upon (see mental1, -ion); replacing Middle English mencioun
  • 1250–1300
    • 1.See corresponding entry in Unabridged indicate, allude to.
    • 4.See corresponding entry in Unabridged allusion, notice.

'not to mention' also found in these entries (note: many are not synonyms or translations):
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