Englishfor English speakers
observable
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adjective
(= discernible, evident)
capable of being seen or noticed
a discernible change in attitude
a clearly evident erasure in the manuscript
an observable change in behavior
event
Noun
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An event is anything that happens.
The event of her walking into the room happened before the event of the book falling off the table, so she saw it fall.
In the event that the machine breaks, read this to know what to do.
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An event is when many people come together at a time they choose for a reason or for fun.
At the event tomorrow we're going to have balloons and music.