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ideal an idea of something in its perfect form. [6 definitions]
identical the same. [3 definitions]
identification the act of showing who a person is or what a thing is. [2 definitions]
identify to figure out or show who someone is or what something is. [3 definitions]
identity all of those things by which a person or thing is known or is considered as being. [3 definitions]
idiom a phrase that cannot be understood by understanding the meanings of each of its words. The phrase "fall out," meaning "have a disagreement," is an idiom.
idiot a stupid person; fool.
idle not active or in use; not working. [6 definitions]
idol a statue or image of a god that is used as an object of worship. [2 definitions]
if on the condition that; in the event that. [5 definitions]
if worst comes to worst if the worst happens; if no other way is successful.
igloo an Inuit hut, shaped like a dome and made of blocks of ice or hard snow.
igneous having to do with rocks formed by a volcano or other source of great heat.
ignite to cause to begin burning; set on fire. [2 definitions]
ignition the act of starting to burn or being set on fire. [2 definitions]
ignorance lack of education or information.
ignorant without knowledge or education. [2 definitions]
ignore to refuse to recognize or fail to take notice of; pay no attention to.
iguana a large lizard found mostly in the warmer parts of Central and South America. Many iguanas have a ridge of spines down the middle of the back. Unlike other lizards, iguanas eat only plants.
IL an abbreviation for Illinois.
il-2 a prefix that means "not" or "without." It is used before words that start with the letter L.