head loss noun2 •(informal) A loss of self-control leading to poor conduct.Fulham will have time to assess their head loss and learn from it over the international break. — 2023 •The pressure lost in a hydraulic system as fluid moves through a pipeline.Determination of minor head loss is simple and straightforward, and a standared nomograph in common use is included at the end of the chapter. — 1995 formshead losses
