Englishfor English speakers
basic
Adjective
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When something is basic, it is simple.
Everyone in the army has to have basic training.
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When something is basic, it is fundamental or important.
Water is a basic necessity of human life: you cannot live without it.
basic
Noun
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Basics are things that are essential.
Beginners must first learn the basics before they become experts.
input/output
noun
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computing
system
Noun
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A group of things that work together; a way of doing something.
This coloured paper is part of my system for keeping lists of people.