From Longman Dictionary of Contemporary Englishbe capped with somethingbe capped with somethingCOVERto have a particular substance on top a graceful tower capped with a golden dome magnificent cliffs capped by lovely wild flowers → cap
Examples from the Corpus
be capped with something• The forefinger of this was capped with a golden nib!• Nocks are vulnerable when landing; but can themselves be capped with a length of vinyl tube.• The central movements are beautifully played, to be capped with a superb opening of the finale.• Warped and folded Paleozoic strata and reddish Tertiary volcanic rocks are capped with dark Quaternary basalt flows.• One is Skorpios, home of the Onassis family; other islands are capped with neat white villages seemingly from another century. 