gag

A device to restrain speech, such as a rag in the mouth secured with tape or a rubber ball threaded onto a cord or strap.

Blood may seep to the back of the throat and may clot, producing an “artificial gag” of clotted blood.

An order or rule forbidding discussion of a case or subject.

Any suppression of freedom of speech.

Civil Court blocks PM's gag on free speech

A joke or other mischievous prank.

We all know how genius “Kamp Krusty,” “A Streetcar Named Marge,” “Homer The Heretic,” “Itchy & Scratchy: The Movie” and “Mr. Plow” are, but even the relatively unheralded episodes offer wall-to-wall laughs and some of the smartest, darkest, and weirdest gags ever Trojan-horsed into a network cartoon with a massive family audience.

a device or trick used to create a practical effect; a gimmick

On Hacksaw Ridge, Oliver and his team of effects artisans devised gags for that spectacular flamethrower shot along with other devastating body and bullet hits, and several mortar and full-scale explosions, all aimed at communicating the reality of battle.

To experience the vomiting reflex.

He gagged when he saw the open wound.

To cause to heave with nausea.

His empty stomach was suddenly full of butterflies, and for the first time since arriving here at scenic Durkin Grove Village, he felt an urge to gag himself. He would be able to think more clearly about this if he just stuck his fingers down his throat […]

To restrain someone's speech by blocking his or her mouth.

“[…] Captain Markam had been found lying half-insensible, gagged and bound, on the floor of the sitting-room, his hands and feet tightly pinioned, and a woollen comforter wound closely round his mouth and neck ; whilst Mrs. Markham's jewel-case, containing valuable jewellery and the secret plans of Port Arthur, had disappeared. […]”

They said no word to the landlord, they drank his ale instead, / But they gagged his daughter and bound her to the foot of her narrow bed; / Two of them knelt at her casement, with muskets at their side!

To pry or hold open by means of a gag.

1917, Francis Gregor (translator), De Laudibus Legum Angliae, Sir John Fortescue, written 1468–1471, first published 1543. […] some have their mouths gagged to such a wideness, for a long time, whereat such quantities of water are poured in, that their bellies swell to a prodigious degree […]

To restrain someone's speech without using physical means.

When the financial irregularities were discovered, the CEO gagged everyone in the accounting department.

The time was not yet come when eloquence was to be gagged, and reason to be hoodwinked.

Abbreviation of group-specific antigen.

Initialism of glycosaminoglycan.