- apt to forget; having a poor memory
- heedless or negligent
- Old Poet. causing to forget: forgetful sleep
Origin of forgetfulMiddle English
- Tending or likely to forget.
- Marked by neglectful or heedless failure to remember: forgetful of one's responsibilities.
- Causing one to be unable to remember.
(comparative more forgetful, superlative most forgetful)
From forget + -ful.