characterized by undue haste and lack of thought or deliberation; "a hotheaded decision"; "liable to such impulsive acts as hugging strangers"; "an impetuous display of spending and gambling"; "madcap escapades"; (`brainish' is archaic)
an unexpected and inexplicable change in something (in a situation or a person's behavior, etc.); "the vagaries of the weather"; "his wealth fluctuates with the vagaries of the stock market"; "he has dealt with human vagaries for many years"
very unusual; different in character or quality from the normal or expected; "a strange, other dimension...where his powers seemed to fail"- Lance Morrow
not the same one or ones already mentioned or implied; "today isn't any other day"- the White Queen; "the construction of highways and other public works"; "he asked for other employment"; "any other person would tell the truth"; "his other books are still in storage"; "then we looked at the other house"; "hearing was good in his other ear"; "the other sex"; "she lived on the other side of the street from me"; "went in the other direction"