Sunblock is a cream that stops the sun reaching the skin. Apply sunblock, high-factor sunblock, a stick of sunblock.
Strictly it means the physical kind, with zinc or titanium sitting on the surface and reflecting light, as against a chemical sunscreen that absorbs it. Regulators in several countries have banned the word, on the grounds that nothing blocks all of it.
1nounsunblockA cream that stops the sun reaching the skin.
“Put on plenty of sunblock before you go to the beach.”
sunblock is a cream.
Sun plus block, a twentieth-century American compound from the cosmetics trade.
From sun + block.
Etymology from Wiktionary, CC BY-SA
Practised in Beauty & Cosmetics