to be out and about visiting one's land, estates/properties (see Molina)
Alonso de Molina:
mimillachia. ni. (pret. onimimilachix.) andar visitando sus tierras o heredades. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 56v. col. 2. Thanks to Joe Campbell for providing the transcription.