I.a., to weep together or very much, to bewail, deplore (rare).
a. Neutr.: simul omnes collacrumarunt, Plaut. ap. Gell. 1, 24, 3; Ter. And. 1, 1, 82: “conplexus me senex collacrimavit,” Cic. Rep. 6, 9, 9: “collacrimantes suum patriaeque casum,” Liv. 26, 14, 4.—
b. Act.: “histrio casum suum toties collacrimavit,” Cic. Sest. 58, 123.