Pic/pɪk/ Definition 1 of 1Pro Tip 1/3Colloquial Use Used in casual conversation, not formal writing or professional communication. Check out this pic from our beach day! Pro Tip 2/3Social Media 'Pic' is frequently used on social media for quickly sharing photos. Post your best vacation pic on Instagram with our hashtag. Pro Tip 3/3Emotional Impact A pic often carries emotional value, remembering a moment or person. Her profile pic with her grandma is really touching.