what is a syrup
: a sweet, thick liquid made of sugar and water with flavoring or medicine added to it.: a sweet, thick liquid made from the juice of a fruit or plant.ull Definition of SYRUP. 1. a: a thick sticky solution of sugar and water often flavored or medicated b: the concentrated juice of a fruit or plant. 2. : cloying sweetness or sentimentality. â syrÂ·upy adjective. See syrup defined for English-language learners.