Englishfor English speakers
invisible
Adjective
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Something is invisible when we can not see it.
light is invisible to animals and humans.
The magician made the woman invisible.
defect
Noun
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A defect in something is a mistake or problem that makes the thing not perfect.
This gem has a defect, so it is not worth much.
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A defect is something that is not perfect.
defect
Verb
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If you defect from a group or country, you leave it and join a different side.
In 1961, defected from Russia.