English Noun seak (uncountable) (obsolete, rare) soap prepared for use in milling cloth[1] References [1]“seak”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC. Anagrams KEAS, saké, akes, aske, kesa, Kase, sake, Seka, keas Wikiwand - on Seamless Wikipedia browsing. On steroids.