A person who makes frames, typically for pictures or artworks; also someone who constructs the framework of a building.
From 'frame' + '-er' (agent suffix from Old English). The '-er' suffix creates agent nouns indicating someone who performs the action of the root verb.
The Framers of the U.S. Constitution are famous because 'framer' originally meant someone who literally built things, but it became a metaphorical term for people who construct systems and laws—words migrate meanings this way all the time!
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