1. lacking logical connection or consistency; not forming a unified whole
2. relating to light waves that do not have a constant phase relationship
Usage: physics; optics

Examples

• The student’s essay was noncoherent, jumping between topics without clear transitions.
• His noncoherent explanation left everyone confused about the project requirements.
• The witness gave a noncoherent account of the events that night.
• Noncoherent light sources produce less precise interference patterns.
• The laser produces coherent light, unlike noncoherent sources such as light bulbs.
• Her noncoherent argument failed to persuade the committee.
• The presentation was noncoherent and difficult to follow.