- (countable) A pit caused on a surface being cut caused by the friction between the two surfaces exceeding the bond of the material at a point.
- (anatomy) The gall bladder.
- (uncountable) A feeling of exasperation.
- (countable) A sore on a horse caused by an ill-fitted or ill-adjusted saddle; a saddle sore.
- (anatomy, obsolete, uncountable) Bile, especially that of an animal; the greenish, profoundly bitter-tasting fluid found in bile ducts and gall bladders, structures associated with the liver.
- (countable) A bump-like imperfection resembling a gall.
- (medicine, obsolete, countable) A sore or open wound caused by chafing, which may become infected, as with a blister.
- (countable) A blister or tumor-like growth found on the surface of plants, caused by burrowing of insect larvae into the living tissues, especially that of the common oak gall wasp Cynips quercusfolii.
- (uncountable, obsolete) Great misery or physical suffering, likened to the bitterest-tasting of substances.
- (uncountable) Impudence or brazenness; temerity, chutzpah.
- To chafe, to rub or subject to friction; to create a sore on the skin.
- To scoff; to jeer.
- To harass, to harry, often with the intent to cause injury.
- To cause pitting on a surface being cut from the friction between the two surfaces exceeding the bond of the material at a point.
"Improper cooling and a dull milling blade on titanium can gall the surface."
- To impregnate with a decoction of gallnuts in dyeing.
- (transitive) To trouble or bother.
- To exasperate.