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.
You can also check other dicts: foil (English, 中文解释 ), wordnet sense, Collins Definition