v.
tr. To make three times as great in number or amount. v.
intr.
To be or become three times as great in number or amount.
Baseball To make a three-base hit.
[Middle English, from Old French, from Latin triplus (on the model of Greek triploos) : Latin tri-, three; see trei- in Indo-European roots + -plus, -fold; see pel-2 in Indo-European roots.]