Lewis & Short

dēclāmĭto, āvi, ātum, 1, v., freq. n. and a. [declamo], to practise rhetorical delivery or declamation, to declaim (good prose; most frequent in Cic.).

  1. I. In a good sense.
          1. (α) Absol.: commentabar declamitans (sic enim nunc loquuntur), saepe cum M. Pisone et cum Q. Pompeio aut cum aliquo cotidie, Cic. Brut. 90, 310; so id. de Or. 1, 59, 251; id. Fam. 16, 21, 5; Quint. 12, 11, 15.
          2. * (β) With acc.: causas, to plead for the sake of practise, Cic. Tusc. 1, 4, 7.
  2. II. In a bad sense, to talk violently, to bluster: de aliquo, Cic. Phil. 5, 7, 19; cf. id. ib. 2, 17.