stain (stains plural & 3rd person present) (staining present participle) (stained past tense & past participle )
1 n-count A stain is a mark on something that is difficult to remove.
oft supp N
Remove stains by soaking in a mild solution of bleach., ...a black stain.
2 verb If a liquid stains something, the thing becomes coloured or marked by the liquid.
Some foods can stain the teeth, as of course can smoking. V n
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stained adj usu v-link ADJ
His clothing was stained with mud.
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-stained comb in adj
...ink-stained fingers.