Real Dictionary

gall
countable noun: A gall is a growth on the surface of a plant that is caused by an insect, disease, fungus, or injury.
uncountable noun: If you say that someone has the gall to do something, you are criticizing them for behaving in a rude or disrespectful way.
verb: If someone's action galls you, it makes you feel very angry or annoyed, often because it is unfair to you and you cannot do anything about it.

gall in American English 1
bile (sense 1)
noun: impudence; effrontery

gall in American English 2
a sore on the skin, esp. of a horse's back, caused by rubbing or chafing
to become sore from rubbing or chafing
to injure or make sore by rubbing; chafe
intransitive verb: to be or become chafed
noun: a sore on the skin, esp. of a horse, due to rubbing; excoriation
transitive verb: to make sore by rubbing; chafe severely

gall in American English 3
a tumor on plant tissue caused by stimulation by fungi, insects, or bacteria: galls formed on oak trees have a high tannic acid content and are used commercially
noun: any abnormal vegetable growth or excrescence on plants, caused by various agents, as insects, nematodes, fungi, bacteria, viruses, chemicals, and mechanical injuries

gall in British English 1
noun: impudence

gall in British English 2
noun: a sore on the skin caused by chafing
verb: to abrade (the skin, etc) as by rubbing

gall in British English 3
noun: an abnormal outgrowth in plant tissue caused by certain parasitic insects, fungi, bacteria, or mechanical injury

gall. in British English
abbreviation for: gallon
noun: a unit of capacity equal to 277.42 cubic inches. 1 Brit gallon is equivalent to 1.20 US gallons or 4.55 litres