Plat, n. 1. The flat or broad side of a sword. [Obs. or Prov. Eng.] Chaucer.

2. A plot; a plan; a design; a diagram; a map; a chart. [Obs. or Prov. Eng.] "To note all the islands, and to set them down in plat." Hakluyt.

Plat, n. [Cf. Plat flat, which perh. caused this spelling, and Plot a piece of ground.] A small piece or plot of ground laid out with some design, or for a special use; usually, a portion of flat, even ground.

This flowery plat, the sweet recess of Eve.

I keep smooth plat of fruitful ground.

Plat, a. [F. plat. See Plate, n.] Plain; flat; level. [Obs.] Gower.

Plat, v. t. To lay out in plats or plots, as ground.

Plat, adv. 1. Plainly; flatly; downright. [Obs.]

But, sir, ye lie, I tell you plat.
Rom. of R.

2. Flatly; smoothly; evenly. [Obs.] Drant.

Plat (?), v. t. [imp. & p. p. Platted; p. pr. & vb. n. Platting.] [See Plait.] To form by interlaying interweaving; to braid; to plait. "They had platted a crown of thorns." Matt. xxvii. 29.

Plat, n. Work done by platting or braiding; a plait.

Her hair, nor loose, nor tied in formal plat.