tablespoonEnglishOxford New American Dictionarytablespoon /ˈtābəlˌspo͞on, ˈteɪbəlˌspun / ▸ noun a large spoon for serving food. ▪ (abbreviation tbsp. or T) a measurement in cooking, equivalent to 1/2 fluid ounce, three teaspoons, or 15 ml. – DERIVATIVES tablespoonful /ˈtāb(ə)lˌspo͞onˌfo͝ol, ˈteɪb(ə)lˌspunˌfʊl / noun (plural tablespoonfuls)