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aardvark	An aardvark is an animal with a long nose, long ears, short fur, and powerful claws for digging. Aardvarks dig so that they can find insects to eat. Aardvarks live in Africa and make their homes in burrows.
abbreviation	An abbreviation is a short way of writing a word. "Mon." is an abbreviation for the word "Monday."
act	a short performance by a musician, comedian, or other entertainer. [1/9 definitions]
ad	a short form of "advertisement," a public notice that tells people about products for sale, events, employment opportunities, or the like.
ain't	"Ain't" is a short way to say "am not," "is not," "are not," "have not," or "has not." Some people think that using "ain't" is using English in the wrong way. Many teachers tell students not to write "ain't" in school assignments.
Alabama	Alabama is one of the fifty states that make up the United States of America. A short way to write Alabama is AL.
Alaska	Alaska is one of the fifty states that make up the United States of America. Alaska is very far north, and it is separate from the main part of the United States. Alaska shares a border with Canada. A short way to write Alaska is AK.
alligator	a large reptile with short legs, a long body and tail, and a long, wide snout. Alligators are protected by thick skin with many hard bumps. They live in rivers, lakes, swamps, and other bodies of water in the southeast United States and in China. They usually eat insects, fish, turtles, snakes, birds, and other water animals, but have been known to attack small land mammals. They are closely related to crocodiles. Chinese alligators are endangered because their habitat is being changed by people.
analog clock	a clock that displays the time using a long hand to show the hour and a short hand to show the minutes.
anecdote	a short tale about a funny or interesting event.
anklet	a short sock that reaches just above the ankle.
apostrophe¹	An apostrophe is a little mark that you see in certain words like "can't" and "I'm." It goes between letters to show that something is missing there. A word like "can't" is a short way of writing and saying "cannot." Using the apostrophe shows that the meaning is the same as "cannot" but that letters are missing and the sound is different. [1/3 definitions]
appendix	a short, closed tube of tissue that grows out of the large intestine. The appendix is on the right side of the lower abdomen. [1/2 definitions]
aren't	"Aren't" is a short way to write or say "are not" and "am not."
Arizona	Arizona is one of the fifty states that make up the United States of America. A short way to write Arizona is AZ.
Arkansas	Arkansas is one of the fifty states that make up the United States of America. A short way to write Arkansas is AR.
audition	An audition is a short performance that someone gives to just a few people to show how well they can act, dance, sing, or play an instrument. When someone does an audition, they hope that the people watching will choose them to be in their play, movie, or something like that. Sometimes people have to give an audition in order to be part of a musical group or to get into a special school. For example, if they want to get into a school of music or dance, they might have to give an audition.
auk	a sea bird with webbed feet and short wings that lives in colder parts of the Northern Hemisphere. Auks are good at swimming and diving.
auto	short form of "automobile," a vehicle powered by a motor that uses gasoline or other fuel; car.
awhile	for a short time.
badger	a furry mammal with short legs and a long body. The American badger has a white stripe on its forehead that runs down its back, and it has long dark marks on its face also. Badgers eat worms, rodents, rabbits, and plants. Different kinds of badgers live in Europe, Asia, and North America. They are related to skunks, otters, and other kinds of weasels. [1/2 definitions]

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