PTA verb 1noun 4forms 4 verb1 •(rare) To take part in a parent-teacher association.[…] PTAing or marketing or playing bridge or doing God knows what else to fill their days […] — 1978 noun4 •Initialism of parent-teacher association.Faraji, my husband, had been elected co-president of P.S. 307’s P.T.A. along with Benjamin Greene, another black middle-class parent from Bed-Stuy, who also serves on the community education council. — 2016 •(Australia) Initialism of permit to acquire: a form lodged with the police to acquire a specific firearm; the authorisation subsequently acquired.get your PTA, and then think about spending a few hundred on a more modern .22 and a scope. — 2004 •Initialism of prepaid ticket advice: information sent to an airline that a passenger will collect the ticket at the airport (not the same as an e-ticket). •Initialism of phosphotungstic acid. formsPTAed · PTAing · PTAs · ptas.