Pix/pɪks/ Definition 1 of 2Pro Tip 1/3Casual Use The word 'pix' is laid-back and often used in informal situations like chatting with friends. Check out these pix from the party last night! Pro Tip 2/3Social Media 'Pix' is commonly used online or in text messages as a quick way to refer to photos. Loved your travel pix on Facebook! Pro Tip 3/3Visual Content Use 'pix' when discussing visual content like photographs or images, not written content. Send me some pix of the new puppy!