adj

• (chemistry) Conditions with a liquid reagent or gas performed with no standard solvent or cosolvent.
  "The Arbuzov reaction is performed by adding the bromide to the phosphite, neat.  The molecular beam was neat acetylene."
• (archaic) With all deductions or allowances made; net.
  "Why without telling the least title of Falshood, within the space of the last Week’s Play, the Gains of Count Cog, really amounted to no less than Twenty Thousand Pounds Sterling neat Money."
• (Canada, US, colloquial) Good, excellent, desirable; interesting; cool.
  "Hey, neat convertible, man."

noun

• (informal) An artificial intelligence researcher who believes that solutions should be elegant, clear and provably correct. Compare scruffy.

noun

• (archaic) A bull or cow.
  "Who both by his calfe, & his lambe wil be known, / may well kill a neate and a shepe of his owne. / And he that wil reare up a pyg in his house, / hath cheaper his bacon, and sweter his souse."

noun

• (archaic) Cattle collectively.
  "From thence into the open fields he fled, / Whereas the Heardes were keeping of their neat / And shepheards singing to their flockes, that fed,"