"purchasing" in the noun sense
1. buying, purchasing
the act of buying
"buying and selling fill their days"
"shrewd purchasing requires considerable knowledge"
"purchasing" in the verb sense
1. buy, purchase
obtain by purchase acquire by means of a financial transaction
"The family purchased a new car"
"The conglomerate acquired a new company"
"She buys for the big department store"
Source: WordNet® (An amazing lexical database of English)
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