Dotage

Part of speech: noun (n.)

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. Foolish utterance; drivel. The sapless dotages of old Paris and Salamanca. Milton.

3. Excessive fondness; weak and foolish affection. The dotage of the nation on presbytery. Bp. Burnet.