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jaywalk to walk across a street in a place or at a time that is against traffic laws.
jazz a form of music with strong, complex rhythms that started with African Americans in the late 1800s. Jazz musicians often add notes or make up parts as they play.
jealous afraid of losing someone's love or attention to another person. [2 definitions]
jealousy a feeling of envy towards another person and what he or she has or can do.
jean pants made from a heavy, often blue, cotton cloth.
jeep (Trademark) a brand of sturdy, powerful car made for driving off roads on rough ground. It was first made for military use. [2 definitions]
Jell-O (trademark) a sweetened, fruit-flavored gelatin dessert.
jelly a soft, firm food that is usually spread on bread or toast. Jelly is often sweet, made from fruit juice and sugar. [2 definitions]
jellyfish a water animal with a soft body shaped like a bell. Jellyfish have many tentacles hanging down from their bodies. Most kinds of jellyfish live in the ocean.
jeopardy danger of harm, death, or loss; at risk.
jerk1 any sudden, sharp movement that is not expected or planned. [5 definitions]
jerky1 having sudden starts and stops or other quick movements that are not expected.
jerky2 beef or deer meat that has been cut into long pieces and dried. Drying the meat preserves it so that it can be eaten at a later time.
jersey a knitted shirt that is often worn by people who play sports. A jersey is pulled on over the head. [2 definitions]
Jerusalem the capital city of Israel.
jest a funny saying or action; joke. [2 definitions]
jester someone hired to tell jokes in royal courts during the Middle Ages in Europe. Jesters often made fun of court life.
Jesus Christ the teacher and prophet who founded the Christian faith. He is considered by Christians to be the son of God and the Christ or savior. Jesus lived from about 4 B.C. to 29 A.D.
jet1 a stream of liquid or gas shooting from an opening, usually with great pressure. [3 definitions]
jet2 a deep, shiny black color.
jet engine an engine that causes forward movement by the power of a stream of gases being forced out under pressure in the opposite direction. Jet engines are often used in aircraft.