← Back to search

Meaning of 621 rule | Babel Free

Noun CEFR B2

Definitions

Alternative spelling of 6-2-1 rule.

alt-of, alternative

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

64-pounder 64mo 64th note 65537-gon 68-95-99.7 rule 69er