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about	If a book is about trains, it means that the book tells you many things on the subject of trains. It might tell you things like where the first trains were built, what fuel trains use, or how fast trains travel. [1/9 definitions]
antelope	an animal with horns, a long neck, long legs, and hooves. Antelopes are known for their fast running. Antelopes are mammals that eat plants and chew their cud. The smallest kind of antelope is only one foot tall; the largest antelope is six feet tall at the shoulder. Gazelles, gnus, and impalas are all antelopes. Most antelopes live in Africa; some also live in Asia. [1/2 definitions]
as¹	If Chloe's sister dresses as her best friend does, it means that she dresses in the same way that her friend does. If you can run as fast as your brother runs, it means that you run at the same speed. [1/6 definitions]
bamboo	Bamboo is a kind of grass plant that grows very tall and has a hard, hollow stem. Bamboo grows very fast, and a plant can grow as tall and straight as a tree.
barrel	to move very fast. [1/4 definitions]
blender	A blender is a machine that people use to make liquid foods. A blender cuts up foods into very small bits and mixes the bits very fast with liquid like juice or milk.
blink	When you blink, your eyes close and then open again very quickly. When we blink, it happens so fast that we usually don't notice it. Blinking is important, though, because it keeps our eyes from getting dry. [1/2 definitions]
bolt¹	When a person or animal bolts, they suddenly start to run away very fast. [1/5 definitions]
boom¹	a time of fast growth. [1/4 definitions]
break	a sudden, fast movement away; escape. [1/19 definitions]
charge	When people or animals charge, they suddenly move forward very fast. When soldiers charge, they move forward quickly in order to attack. [1/9 definitions]
clip¹	a fast rate of speed. [1/5 definitions]
clipper	a fast type of sailing ship. [1/2 definitions]
cruiser	a fast ship of medium size. Cruisers are used in wars. [1/3 definitions]
current	When we talk about the current of a river, we are talking about the movement of the water as it goes along. If the current is very strong, it can move a boat very fast. Air also moves in currents. A strong air current can make an airplane go much faster. [1/3 definitions]
dance	When you dance, you move your feet and body to music. You can dance fast or slow, and you can dance alone, with a partner, or in a group of people. [1/7 definitions]
dashboard	A dashboard is a part of a car or other vehicle. It contains gauges that give information to the driver, such as how fast the vehicle is going, how many miles or kilometers the vehicle has already traveled, whether the engine is running okay or not, and how much fuel the vehicle has. It also has controls for things like heat and air conditioning.
deer	a mammal with short fur, long legs, and a long neck. Deer have hooves on their feet and can run very fast. The males of most kinds of deer grow and shed antlers every year. Deer are herbivores that chew their cud. Caribou, elk, moose, reindeer, and white-tailed deer are all kinds of deer.
destroyer	a small, fast warship.
dive	When you dive, you jump down from a high place with your head and arms going first. When a bird or airplane dives, it changes its position in the air and heads very fast toward a lower place. [1/4 definitions]
drag	When someone or something drags behind, they follow others because they can't go as fast. If you go for a walk with your friends, and you drag behind, it means that you walk slower than they do and can't keep up with them. [1/5 definitions]

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