YELLOWFIN Meaning of YELLOWFIN in English ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ nounEtymology: yellow (I) + fin 1.a. Scotland : troutb. Britain : a sea trout smolt2.a. : yellowfin tunab. : yellowfin croaker Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012