Definition of "PG"

PG

adjective
not comparable
1. Initialism of parental guidance: suitable for viewing, reading, or listening, by minors.
  Quotations
  More significantly, rigid deference to Bieber’s still-young core fan base keeps things resolutely PG, with any acknowledgement of sex either couched in vague “touch your body” workarounds or downgraded to desirous hand-holding and eye-gazing.
  2012 June 26, Genevieve Koski, “Music: Reviews: Justin Bieber: Believe”, in The Onion AV Club‎
noun
countable and uncountable, plural PGs
1. (uncountable, film, British, US) Initialism of parental guidance, a rating for a film that may be viewed by minors at their parents' discretion.
  Quotations
  I've had it. That's it George! For one year now, I've been providing X-rated entertainment and you reciprocate with PG! It's an iniquitous arrangement!
  1979, Blake Edwards, 10, spoken by Neighbor
2. (countable, chiefly UK) Initialism of paying guest.
3. (countable, basketball) Initialism of point guard.
4. (slang) Short for paregoric, a painkiller.
  Quotations
  Taking along a pint of P.G. and a large supply of goof balls to taper off.
  1948, William S. Burroughs, letter, 30 Nov 1948
5. (biochemistry) Initialism of proteoglycan.
6. (organic chemistry) Initialism of propylene glycol.
proper noun
1. (linguistics) Initialism of Proto-Germanic.
2. Initialism of Persian Gulf.
3. (comics) Initialism of Power Girl (“DC Comics superheroine”).
  Quotations
  Although Supergirl fans will relish page 4, I believe the first panel of 5 says it all: after a full force ramming by SG, PG just casually tosses her into a wall. Now *that's* Power Girl.
  1997 October 25, Lightning, “REVIEW Power Girl #1, uhm, I mean Supergirl #16”, in rec.arts.comics.dc.universe‎ (Usenet), message-ID <62tta5$a7g$1@206.230.70.77>
  Actually, a point could be made that the animated Supergirl is much more like Power Girl than the pre Crisis Supergirl.For one thing she adopted the name Karen (Karen Starr was the name Kara Zor-L created), also she wears PG's costume colors and has a strong resentment toward's Clark's overprotectiveness. The only difference is that the animated SG has the Kara Zor-El personality more than she does Power Girl's.
  1998 May 6, CaptT...@webtv.net, “Re: Why is TV kind of pre-Crisis and comics Post-Crisis”, in rec.arts.comics.dc.universe‎ (Usenet), message-ID <6iouoe$1jf$1@newsd-134.iap.bryant.webtv.net>
  I kinda hate how they made Power Girl (Kara/SG pre-Crisis on World 2 or 3?) evil and a clone of SG. One of my fav comics growing up was Supes, and PG and I think Green Arrow going after Vandal Savage.
  2005 September 21, tan...@bellsouth.net, “Re: JLU - WOW”, in alt.tv.cartoon-network‎ (Usenet), message-ID <SL7Ye.4284$xg3.1881@bignews4.bellsouth.net>
4. Abbreviation of Prince George's County.
5. (gaming) Initialism of Pokémon Go.
6. Initialism of Project Gutenberg.