Of or pertaining to being too numerous.(adjective)
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Use "overnumerous" in a sentence
"If monkeys, crows, or other bold marauders are overnumerous, he probably has to sit out in the rude watch-house in the little clearing and keep the scarecrows moving, or by shouts and other means drive off the uninvited pests."
"They were overnumerous as I maundered up from where at last the road leaves the valley and makes over a little pass for a place called Schangnau."