1. in a manner relating to or involving a collision or collisions
Usage: technical; chiefly used in physics and chemistry contexts

Examples

• The gas molecules interact collisionally at high temperatures.
• Energy is transferred collisionally between particles in the plasma.
• The atoms were excited collisionally through repeated impacts.
• In the collision chamber, particles collisionally exchange momentum.
• The ionization occurs collisionally when electrons strike neutral atoms.