the world > relative properties > number > specific numbers > three > multiplication by three > multiply by three [verb (transitive)] (6)
transitive. To make three times as many or as great; to increase threefold; to multiply by three.
transitive. To make three times as great or as many as before; to multiply by three; to make threefold; to treble.
transitive. To multiply by three; to increase threefold; to triple.