Lay a finger on

What is Lay a finger on?

Lay a finger on definition and meaning on Dictionary terms:
the wearing of lightweight or unconstructed garments one upon the other, as to create a fashionable ensemble or to provide warmth without undue bulkiness or heaviness.
Tailoring. the trimming of multiple layers of fabric at the seam allowance of a garment so as to prevent a ridge on the face of the garment when the seam is sewn.
Horticulture. Also layA.erA.age [ley-er-ij] /E?leEaa??E?ra??EadE?/. a method of propagating plants by causing their shoots to take root while still attached to the parent plant.