Where does “11+” come from?

11+ (English) comes from English 11 — A cricket team of eleven players; A football team...

Ancestry of “11+”, step by step

11+ traces back through two separate lines of ancestry.

via English 11

StepLanguageWordMeaning
1English11A cricket team of eleven players; A football team...

via Translingual +

StepLanguageWordMeaning
1Translingual+When placed between key names, indicates that...
Every word from English 11
11+ — Etymology, Origin & Word History | Etymology Explorer