the act of colliding
"the collision of the particles resulted in an exchange of energy and a change of direction"
"three passengers were killed in the collision"
"the collision of the two ships resulted in a serious oil spill"
"a collision of interests"
The number of collisions of the particle with the atom.
出自： E. Rutherford
His head came into painful collision with a wooden crate.
出自： J. Wain
His brakes squealed, to avoid a collision with a truck.
出自： M. Shadbolt