(1):

(n.) 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.

(2):

(n.) A batten laid lengthwise between two rafters to afford a bearing for laths laid crosswise.

(3):

(n.) Any lath laid without actual measurement between two gauged laths.

(4):

(n.) Any of a series of laths nailed to the timbers to raise the sheet lathing above their surface to afford a key for plastering.