Definition of "bestial"

Reputation, reputation, reputation! O, I have lost my reputation! I have lost the immortal part of myself, and what remains is bestial.

c. 1603–1604 (date written), William Shakespeare, “The Tragedie of Othello, the Moore of Venice”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act II, scene iii]

By thee adulterous lust was driven from men /Among the bestial herds to range […]

1667, John Milton, “Book IV”, in Paradise Lost. […], London: […] [Samuel Simmons], […]; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, lines 753-4

This familiar that I called out of my own soul, and sent forth alone to do his good pleasure, was a being inherently malign and villainous; his every act and thought centered on self; drinking pleasure with bestial avidity from any degree of torture to another; relentless like a man of stone.

1886 January 5, Robert Louis Stevenson, Strange Case of Dr Jekyll and Mr Hyde, London: Longmans, Green, and Co.

His was a bestial face, a face that bore the stamp of Nature's eternal injustice.

1900 April, Willa Cather, “Eric Hermannson's Soul”, in Cosmopolitan

The Game of Thrones novels were best sellers without fleshed-out Dothraki; the languages in Star Wars, one of the most successful franchises ever, are mostly gibberish, even if Han Solo claims to understand Chewbacca’s bestial warbling.

2022 December 31, Matteo Wong, “Hollywood’s Love Affair With Fictional Languages”, in The Atlantic

[…] much must depend upon the way in which bestial are bought or reared, and the state of the markets when they are sold.

1845, The New Statistical Account of Scotland: Forfar, Kincardine, page 94