Definition of "maunder"

He was ever maundering by the how that he met a party of scarlet devils.

1826, [Walter Scott], Woodstock; Or, The Cavalier. […], volumes (please specify |volume=I to III), Edinburgh: […] [James Ballantyne and Co.] for Archibald Constable and Co.; London: Longman, Rees, Orme, Brown, and Green

"Not so fast, Lady Cecilia; not yet;" and now Louisa went on with a medical maundering. "As to low spirits, my dear Cecilia, I must say I agree with Sir Sib Pennyfeather, who tells me it is not mere common low spirits […] "

1834, Maria Edgeworth, Helen: v. 3, ch. V

On the following day my friend's exhaustion had become so great that I began to fear his intelligence altogether broken up. But toward evening he briefly rallied, to maunder about many things, confounding in a sinister jumble the memories of the past weeks and those of bygone years.

1871, Henry James, “ch. IV”, in A Passionate Pilgrim

What are you maundering about? He's going out from here a free man and whole—he's not going to die.

1889, Mark Twain, A Connecticut Yankee in King Arthur's Court, ch. XVII

Whether Edwina [mother of Tennessee Williams] had sufficient self-awareness to recognize her own maundering about (say) "seventeen! – gentleman callers!" is doubtful, but she was indeed Amanda [Wingfield, character in Williams' play The Glass Menagerie] in the flesh: a doughty chatterbox from Ohio who adopted the manner of a Southern belle and eschewed both drink and sex to the greatest extent possible.

2014 November 14, Blake Bailey, “'Tennessee Williams,' by John Lahr ”, in The New York Times‎

[Deacon Mushrat to Pogo:] The Machiavellian barratry of a pettifogging public has maundered into do-nothingism.

1959 April 24, Walt Kelly, Pogo, comic strip, page 35