noun
1. tendency to forget (Freq. 3)
• Derivationally related forms: ↑forgetful
• Hypernyms: ↑amnesia, ↑memory loss, ↑blackout
• Hyponyms: ↑senior moment
2. unawareness caused by neglectful or heedless failure to remember
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his forgetfulness increased as he grew older
• Derivationally related forms: ↑forgetful
• Hypernyms: ↑unknowingness, ↑unawareness
• Hyponyms: ↑obliviousness, ↑oblivion
Useful english dictionary. 2012.