staunch /stɔːn(t)ʃ/adjective 8noun 4forms 3 adjective8 •Staying true to one's aims or principles; firm, resolute, unswerving.Without our staunch front line the enemy would have split the regiment. •Dependable, loyal, reliable, trustworthy.He’s been a staunch supporter of mine through every election. •Of a hunting dog: that can be depended on to pick up the scent of, or to mark, game.For, scarce a spear's length from his haunch, / Vindictive toiled the blood-hounds staunch; […] — 1810 •(figurative) Stubborn, intransigent. •Strongly built; also, in good or strong condition.This part of the castle was burned last autumn; but it is now under repair, and the wall of the tower is still stanch and strong. — 1856 •Not permitting water or some other liquid to escape or penetrate; watertight.Yet if I knevv, / VVhat Hoope should hold vs staunch from edge to edge / Ath'vvorld [of the world]: I vvould persue it. — 1606 •Impermeable to air or other gases; airtight. •(figurative, no longer used) Cautious, restrained. noun4 •Synonym of afterdamp (“suffocating gases present in a coal mine after an explosion caused by firedamp”). •(no longer used) That which stanches or checks a flow. •(no longer used) A plant or substance which stops the flow of blood; a styptic. •(no longer used) An act of stanching or stopping. formsstaunches · stauncher · staunchest