As a noun bystander
is a person who, although present at some event, does not take part in it; an observer or spectator.
As a verb observor is
.
bystander
English
Noun
(
en noun)
a person who, although present at some event, does not take part in it; an observer or spectator
See also
* rubberneck
observor
Not English
Observor has no English definition. It may be misspelled.