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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.
jet lag a feeling of being very tired or not well after traveling by airplane across different time zones.
jet-propelled using the power of a jet engine or engines.
jet propulsion a way of giving aircraft and some small ships the power to move forward. Jet propulsion forces air and hot gases under high pressure to go through a jet nozzle.
jet stream a narrow band of strong, fast wind several miles above the earth's surface. The jet stream usually flows from west to east.
jettison to throw from a ship or airplane to make it lighter or more stable. [2 definitions]
jetty1 a group of rocks or wooden beams built out into a body of water. Jetties are used to control the flow of water and protect the shore from strong waves. [2 definitions]
Jew a person whose ancestors were the Biblical Hebrews. [2 definitions]
jewel a special stone that has been cut and made smooth; gem. Jewels are used to make jewelry and ornaments. [2 definitions]
jeweler a person who makes, fixes, or sells gems or jewelry.
jewelry rings, watches, necklaces, or other ornaments; jewels.
Jewish of or having to do with Jews, their culture, traditions, or religion.
jib1 a sail that is shaped like a triangle and used in the front of a sailing boat.
jiffy (informal) a very short time; instant.
jig2 a fast, lively dance. [4 definitions]
jigsaw a saw that can be used to cut sharp corners or curved designs. Jigsaws are usually powered by electricity.