dimple -
To create a dimple in one's face by smiling.
dimple -
To form dimples; to sink into depressions or little inequalities.
Wikipedia
Dimples are visible indentations of the skin, caused by underlying flesh, which form on some people's cheeks, especially when they smile (may be obscured by male facial hair). Dimples are genetically inherited and are a dominant trait. Dimples are usually found on both cheeks.
OmegaWiki Dictionary
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dimple A small natural depression on the cheeks of some people, that is especially visible when they smile.
dimple A small hollow that some people have at the end the chin.
dimple A small depression or indentation in a surface.