lather/ˈlæðɚ/Plurallathers1the thick, foamy substance formed when soap or shampoo is mixed with water during the process of washingCopySynonyms: sudssoapsuds2the foam resulting from excessive sweating (as on a horse)Copy3a workman who puts up lathsCopy4agitation resulting from active worryCopySynonyms: fretswitherstewsweat