n.
Pronunciation: k ə - ' li-zh ə n
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 \ - ' lizh-n ə l, - ' li-zh ə -n ə l \ adjective
– col · li · sion · al · ly adverb