D defs.my
Entry 3 senses Webster, 1913

Dotage

· Do·tage · IPA /ˈdoʊtɪd͡ʒ/
01 n. Feebleness or imbecility of understanding or mind, particularly in old age; the childishness of old age; senility; as, a venerable man, now…
  1. 1.
    Feebleness or imbecility of understanding or mind, particularly in old age; the childishness of old age; senility; as, a venerable man, now in his dotage.
    “Capable of distinguishing between the infancy and the dotage of Greek literature.” Macaulay.
  2. 2.
    Foolish utterance; drivel.
    “The sapless dotages of old Paris and Salamanca.” Milton.
  3. 3.
    Excessive fondness; weak and foolish affection.
    “The dotage of the nation on presbytery.” Bp. Burnet.