1.Definition: (of an alcoholic drink) without water
"Took his whiskey neat"
2.Definition: clean or organized
"Her neat dress", "A neat room"
3.Definition: free from clumsiness; precisely or deftly executed
"The neat exactness of the surgeon's knife"
4.Definition: showing care in execution
"Neat homework", "Neat handwriting"
5.Definition: superficially impressive, but lacking depth and attention to the true complexities of a subject
"It was a neat plan, but bound to fail"
6.Definition: very good
"A neat sports car"