foil noun

1 metal in a thin sheet

ADJ. aluminium, gold, silver, tin | kitchen

QUANT. piece, sheet | roll

VERB + FOIL cover sth with, wrap sth in I wrapped the sandwiches in kitchen foil.

2 sth that shows off the qualities of sth else

ADJ. good, ideal, perfect

VERB + FOIL be, provide

PREP. as a ~ She has used mosses as a foil for the brightly coloured flowers in the bed. | ~ for/to The couple provided the perfect foil for one another.