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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

abstraction, abstract entity go
a general concept formed by extracting common features from specific examples

psychological feature go
a feature of the mental life of a living organism

event go
something that happens at a given place and time

happening, occurrence, occurrent, natural event go
an event that happens

trouble go
an event causing distress or pain

disturbance, interference, noise go
electrical or acoustic activity that can disturb communication

background, background signal
extraneous signals that can be confused with the phenomenon to be observed or measured

noun.event

2 Subcategories

background noise, ground noise go
extraneous noise contaminating sound measurements that cannot be separated from the desired signal
background radiation go
radiation coming from sources other than those being observed