Legal Definition of waiver. : the act of intentionally or knowingly relinquishing or abandoning a known right, claim, or privilege; also : the legal instrument evidencing such an act â compare estoppel, forfeiture.
YAWL: Yet Another Workflow Language. YAWL is a BPM/Workflow system, based on a concise and powerful modelling language, that handles complex data transformations, and full integration with organizational resources and external Web Services. YAWL offers:
yawn (plural yawns) 1  The action of yawning; opening the mouth widely and taking a long, rather deep breath, often because one is tired. 2  A particularly boring event. The slideshow we sat through was such a yawn.