1 noun act of spreadingleathadh masc c m uscaipeadh masc c m uthe global diffusion of technologyleathadh na teicneolaíochta ar fud na cruinne2 noun of lightréscaipeadh masc3 noun PHYS of gases, molecules, etcidirleathadh masc4 noun ANTH of cultureleathadh masc c m uscaipeadh masc c m ucraobhscaoileadh masc c m u