Longman Dictionary of Contemporary English
Wiktionary
a. Poorly considered.
WordNet
adj. not given careful consideration; "ill-considered actions often result in disaster"; "an ill-judged attempt" [syn: ill-judged, improvident, shortsighted]
Usage examples of "ill-considered".
Earlier Belial had apologised to him for his ill-considered words about Azhure and they had grasped hands, friends once more.
Most coke freaks have already blown their memories by years of over-indulgence on marijuana, and by the time they get serious about coke they have a hard time remembering what day it is, much less what kind of ill-considered bets they might or might not have made yesterday.
The sperm-donated daughter was twelve when she took Eleanor Holt’s dildo—a battery-powered vibrator—to the Bridgehampton alternative middle school for that ill-considered part of American education known as Show and Tell.
If his father had intended this civilized meal and quiet moment as a bribe or a peace offering, it was ill-considered.
All this had been a weary, anxious task, and the contemplation of his hastily, partially re-read, almost certainly over-voluble and ill-considered series of letters bounding over the ocean wave (for the breeze was favourable) so wrung his weary spirit that for the first time in a great while he turned to his old friend and enemy laudanum, the alcoholic tincture of opium, and plunged into a sleep, guilty for the first few fathoms and then pure balm.