counterlath noun 4verb 1forms 3 noun4 •A batten laid lengthwise between two rafters as a bearing for laths laid crosswise. •Any lath laid without actual measurement between two gauged laths. •Any of a series of laths nailed to the timbers to raise the sheet lathing above their surface to afford a key for plastering. •One of many laths used in preparing one side of a partition or framed wall, when the other side has been covered in and finished. verb1 •To fit or supply with a counterlath. formscounterlathed · counterlathing · counterlaths