Longman Dictionary of Contemporary English homepage

invisible

 adjective
     
in‧vis‧i‧ble
1 something that is invisible cannot be seen [≠ visible]:
The house was surrounded by trees and invisible from the road.
invisible to
The plane is meant to be invisible to radar.
Using a telescope, Galileo discovered stars that were invisible to the naked eye.
2 not noticed, or not talked about:
There's an invisible barrier that keeps women out of top jobs.
3

invisible earnings/exports/trade etc

BBBF money that is made from services and tourism rather than from products
—invisibly adverb
—invisibility noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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