Main Entry: col·li·sion

Pronunciation: \kə-ˈli-zhən\

Function: noun

Etymology: Middle English, from Latin collision-, collisio, from collidere

Date: 15th century

1 : an act or instance of colliding : clash
2 : an encounter between particles (as atoms or molecules) resulting in exchange or transformation of energy

synonyms see impact

— col·li·sion·al \-ˈlizh-nəl, -ˈli-zhə-n^əl\ adjective

— col·li·sion·al·ly adverb