Englishfor English speakers
adult
Noun
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An adult is a person who is of the legal age of majority.
At age 18 years, he became an adult, so he could move out without his parents' consent.
Adult usually means a person who is either age 18 years or older.
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An adult is a human who is mentally and sexually mature.
The Harry Potter series was read mostly by young adults.
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An adult is a sexually mature nonhuman animal.
Adult female cows feed milk to their offspring.
education
Noun
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Someone gets an education if that person learns something or if somebody teaches that person something, usually at school.
More and more people are starting work with a university education.
He studied German by himself, but he has no formal education.
institution
Noun
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A custom or practice of a society or community.
The institution of marriage is present in many cultures but its details vary widely across them.
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An institution is a large group of people who work together for a specific purpose. Examples include hospitals, universities, and banks.
Banks, insurance companies and other financial institutions are already offering internet services.