waterfalling noun4 •Applying a waterfall model of design and project management to any particular project or phase thereof (in contrast with applying an agile model). •Turbulent flow, or the damage caused by such turbulence (such as spalling).If the film folds over on itself as a result of turbulent flow or "waterfalling," the effects can be particularly damaging. — 2003 •The practice of gradually building up to the release of an upcoming album by releasing a series of singles, each accompanied by all previously released singles for that album as an addendum. •Hiking to and climbing up active waterfalls.