teaspoon Syllabification: (tea·spoon)Pronunciation: /ˈtēˌspo͞on/Translate teaspoon | into French | into German | into Italian | into Spanish Definition of teaspoon noun a small spoon used typically for adding sugar to and stirring hot drinks or for eating some soft foods. (abbreviation: tsp. or t) a measurement used in cooking, equivalent to 1/ 6 fluid ounce, 1/ 3 tablespoon, or 4.9 ml. Derivatives teaspoonfulPronunciation: /-ˌfo͝ol/ noun (plural teaspoonfuls)teaspoon in other Oxford dictionaries Definition of teaspoon in the British & World English dictionary