tea ‧ spoon /ˈtiːspuːn/ BrE AmE noun [countable]
1 . a small spoon that you use for mixing sugar into tea and coffee
2 . ( also teaspoonful /ˈtiːspuːnfʊl/) ( written abbreviation tsp ) the amount that a teaspoon can hold, used as a unit for measuring food or liquid in cooking
teaspoon of
Add a teaspoon of salt.