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Wiktionary
capital expenditure

n. funds spent by a company to acquire or upgrade a long-term asset.

WordNet
capital expenditure

n. the cost of long-term improvements

Wikipedia
Capital expenditure

Capital expenditure or capital expense ("capex") is an expense where the benefit continues over a long period, rather than being exhausted in a short period. Such expenditure is of a non-recurring nature and results in acquisition of permanent assets. It is thus distinct from a recurring expense.