or sun block

[ suhn-blok ]

  1. a substance that provides a high degree of protection against sunburn, often preventing most tanning as well as burning, as by obstructing the penetration of ultraviolet rays.

  2. a lotion, cream, etc., containing such a substance.

Origin of sunblock

First recorded in 1975–80; sun + block

Words Nearby sunblock Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use sunblock in a sentence