noun.
A harsh or shrill call or whistle expressing derision or disapproval.
intransitive verb.
To express derision or disapproval of with catcalls.
intransitive verb.
To make catcalls.
The Century Dictionary and Cyclopedia
noun.
A squeaking instrument used in playhouses to express disapprobation or weariness of the performance, or a sound made in imitation of the tone of this instrument.
To express disapprobation of by sounds produced by or like those of the catcall.
the GNU version of the Collaborative International Dictionary of English
noun.
A sound like the cry of a cat, such as is made in playhouses to express dissatisfaction with a play; also, a small shrill instrument for making such a noise.