Chunk/tʃʌŋk/ Definition 1 of 4Pro Tip 1/3Physical Objects Refers to physical parts of something typically visible and tangible, stressing on size. She grabbed a chunk of the broken vase to show the damage. Pro Tip 2/3Not Precise The size of a chunk is usually unclear, suggesting an amount that is large but not exact. I need a chunk of chocolate to add to this recipe. Pro Tip 3/3Casual Tone Chunk has a casual tone, often used in everyday conversation rather than formal writing. Grab a chunk of those snacks for the movie.