緘 かん Meanings Noun seam; seal (e.g. envelope) See also: 緘する (かんする). writing on the seal of an envelope Kanji 緘 shut; seal. Read as カン. Words containing 緘 封緘 (ふうかん) seal (letters, documents, etc.) 緘口令 (かんこうれい) gag order 緘黙 (かんもく) keeping silent And 7 more. Jinuma: Japanese Dictionary · Word lists