What is the meaning of Argus?

A watchful guardian.

An alert, observant person. (Can we add an example for this sense? )

Either of two species of pheasant of Southeast Asia having large ocellated tails.

Any of various nymphalid butterflies, such as those of the genus Junonia, also called pansies.

of Argos, Argive

a taxonomic epithet for an organism having many markings that look like eyes

A guinea pig.

argus (a watchful guardian)

great argus (Argusianus argus)

argus

Source: wiktionary.org