MOO • FREE TRANSLATOR.ORG • Definition of Moo

... and they conversed mainly by means of quick signals made with their wooden fingers or lips. Neither was there any sound to be heard anywhere throughout the wooden country. The birds did not sing, nor did the cows moo; yet there was more than ordinary ...

— Dorothy and the Wizard in Oz • L. Frank Baum.

... rest, for which I gave, in the words of our indefatigable Chaplain, "three good, rollicking cheers." Some folks are coming up to see me this afternoon. I hear I must moo through the fence at them like a cow. (Later.) The folks have just left. Mother kept screaming through the wire about my underwear. She seemed to have it on her brain. There were several young girls standing right next to her. I really felt I was ...

— Biltmore Oswald - The Diary of a Hapless Recruit • J. Thorne Smith, Jr.