To make useful, to find a practical use for.(verb)
To make use of; to use.(verb)
To make best use of; to use to its fullest extent, potential, or ability.(verb)
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Use "utilise" in a sentence
"Development must be integrated and sustainable, that is to say utilise our resources to satisfy present needs without compromising the needs of future generations."
"The inordinate jealousy Italians have of foreigners, and their fear lest they should "utilise" Italy, and carry away all her wealth with them, has been the source of innumerable mistakes."
"When you use 'utilise' you're telling me that you're throwing flowers at a bad idea in the hope that I will go 'ooh, nice flowers' instead of 'ooh, bad idea'."