Third-person singular simple present indicative form of flock.(verb)
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Use "flocks" in a sentence
"We even know that some species nested in 'flocks' and cared for their young, even after hatching."
"(Even the “cockroach as socialist” argument begins to break down when you consider that it has been recently discovered that the actions of birds in flocks are predominantly individual, with the flocks themselves serving as market mechanisms that enable such groups to fly together more efficiently over long distances.)"
"Passenger pigeons once traveled around the United States in flocks so large, they could reportedly block out the sun over a town for eight hours."