- (transitive) To use a laser beam on, as for cutting.
- The surgeon lased the elongated soft palate, cutting off the excess tissue and stopping the blood flow in one swipe.
- The physical chemist lased the atoms as they passed between the electrodes to study their motion.
- 2010 (publication date), Daniel Lametti, "The Proton Gets Small(er)", Discover, ISSN 0274-7529, volume 32, number 1, January–February 2011, page 67:
- When a laser zaps an electron orbiting a proton, the electron undergoes what is called the Lamb shift, absorbing energy and jumping to a higher energy level. […] But instead of lasing electrons, Knowles examined protons with particles called muons, which he calls "the electon's fat cousin."
- (intransitive) To operate as a laser, to release coherent light due to stimulation.