above-board vs plat

above-board

adv
  • Honestly; openly. 

adj
  • In open sight; without trick, concealment, or deception. 

plat

adv
  • Flatly, plainly. 

noun
  • A braid; a plait (of hair, straw, etc.). 

  • A plot of land; a lot. 

  • Material produced by braiding or interweaving, especially a material of interwoven straw from which straw hats are made. 

  • A map showing the boundaries of real properties (delineating one or more plots of land), especially one that forms part of a legal document. 

verb
  • To braid, to plait. 

  • To create a plat; to lay out property lots and streets; to map. 

adj
  • Flat; level; (by extension) frank, on the level. 

How often have the words above-board and plat occurred in a corpus of books? (source: Google Ngram Viewer )