Adjective has 2 senses

• offhanded(s = adj.all) ad-lib, extemporaneous, extemporary, extempore, impromptu, off-the-cuff, offhand, unrehearsed - with little or no preparation or forethought; "a few unrehearsed comments"; "an extemporaneous piano recital"; "an extemporary lecture"; "an extempore skit"; "an impromptu speech"; "an off-the-cuff toast"; "his ad-lib comments showed poor judgment"; "offhand excuses"; "trying to sound offhanded and reassuring"


• offhanded(s = adj.all) offhand - casually thoughtless or inconsiderate; "an offhand manner"; "she treated most men with offhand contempt"

Adverbial has 2 senses

• offhanded(r = adv.all) offhand, offhandedly - without previous thought or preparation; "couldn't give the figures offhand"; "she had made these remarks offhandedly"; "we decided offhand to go to Canada"
• offhanded(r = adv.all) offhand, offhandedly - in a casually inconsiderate manner; "replied offhand, his mind a million miles away"; "she threw him over offhandedly without even a Dear-John letter"