a. Done or made without due consideration or attention; precipitate or cursory: a hasty decision; a hasty conclusion. See Synonyms at impetuous.

b. Done or made rapidly due to pressing circumstances: beat a hasty retreat; bid a hasty goodbye.

a. Acting with too much speed or haste; hurried: Don't be too hasty in taking sides.

b. Impatient or rudely abrupt: "Oh, what would I not give if I had been less hasty with her! It is dreadful to remember that I spoke to her as a servant whom I expected to obey me" (Wilkie Collins).