the cabildo (town council office), or a place of congregation or of accord/agreement (see Molina)
Alonso de Molina:
nenonotzaloyan. cabildo, o lugar de congregacion, o acuerdo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 68v. col. 1. Thanks to Joe Campbell for providing the transcription.