IPA: /ˈɡeɪpər/
KK: /ˈɡeɪpər/
A person who stares or looks at something with wide-open eyes, often in surprise or curiosity.
The gaper stood in awe as the magician performed his tricks.
The word 'gaper' originates from the verb 'gape' (from Old English 'gapan', meaning to open the mouth wide or to stare) combined with the suffix '-er' (meaning a person who). A gaper is thus a person who stares or opens their mouth wide, often in surprise or wonder.
Think of someone who is 'staring' ('gape') with their mouth 'open' ('-er') in amazement — that's what a gaper does.