The word "pac" is a short form of the word "pacifier." It refers to a small object, usually made of rubber or silicone, that babies suck on to soothe themselves. Full definition
She accused the super PAC of running a well - funded smear campaign. (syracuse.com)
It was good when he got the same type of PAC money last year. (nystateofpolitics.com)
It was an opportunity for PAC members and their families to come together for an evening of hands - on science and community building activities before embarking on our work together for the year. (pacsf.org)