minder (Noun) — Someone (usually in totalitarian countries) who is assigned to watch over foreign visitors. ex. "I turned around and there, a few hundred feet away, was our government minder, Li Wong Su, huffing and puffing toward us"
minder (Noun) — A person who looks after babies (usually in the person's own home) while the babies' parents are working.
minder (Noun) — (informal) a bodyguard.