Lewis & Short

acclāmātĭo (adc.), ōnis, f. [acclamo], a calling to, an exclamation, shout.

  1. I. In gen.: acuta atque attenuata nimis, Auct. Her. 3, 12, 21; the calling of the shepherd, Col. 7, 3, 26; so in plur., id. 6, 2, 14.
  2. II. In partic.
    1. A. A cry of disapprobation (so esp. in the time of the republic): ei contigit non modo ut adclamatione, sed ut convicio et maledictis impediretur, Cic. Q. Fr. 2, 3, 2; 2, 1, 2; quanto jam levior est adclamatio, C. Rabir. 18; id. de Or. 2, 83, 339 etc.; Suet. Dom. 23 al.
    2. B. On the contrary, esp. later, a shout of approbation (e. g. on the appearance of a person honored by the people), a huzza: adclamationes multitudinis assentatione immodica pudorem operantis, Liv. 31, 15, 2; so Suet. Caes. 79; id. Aug. 58; id. Oth. 6 (made by the voice; while plausus is made with the hands, Quint. 8, 3, 3).
    3. C. Rhetor. a figure of speech = exclamatio, ἐπιφώνημα, exclamation, Quint. 8, 5, 11.