A person whose job is to greet customers, guests, or visitors; someone who greets warmly or habitually.
From 'greet' (Old English 'grētan,' to weep or accost) plus the agent noun suffix '-er' (one who does the action). Modern sense emphasizes the welcoming aspect.
The '-er' suffix is so productive that any verb becomes a job title—baker, maker, teacher—and English speakers use this instantly to create new words for new jobs like 'greeter' as retail roles emerged!
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