Moved or gathered a group of animals together, or gathered people together in a group.
From Old English 'heord' (group of animals), akin to German 'Herde.' A herd-man was originally a shepherd, and 'herd' as a verb meant to tend a flock.
We use 'herd' as an insult for how people behave in groups ('herd mentality'), but scientifically, herding is incredibly smart—fish, birds, and wildebeest in herds are safer and smarter than alone, so being a 'herd animal' is actually an evolutionary win.
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