Dotard

• (v. i.) One whose mind is impaired by age; one in second childhood.
Found on http://thinkexist.com/dictionary/meaning/dotard/

dotard

noun an oldster in his dotage; someone whose age has impaired his intellect
Found on https://www.encyclo.co.uk/local/20974

Dotard

Do'tard noun [ Dote , intransitive verb ] One whose mind is impaired by age; one in second childhood. « The sickly dotard wants a wife.» Prior.
Found on http://www.encyclo.co.uk/webster/D/112

dotard

someone whose age has impaired his or her intellect
Found on https://www.vocabulary.com/lists/1862786

dotard

[n] - an oldster in his dotage
Found on http://www.webdictionary.co.uk/definition.php?query=dotard
No exact match found