Pi (i), n. Young of birds, chick, particularly of land birds. He manu hou ahau, he pi ka rere (P.).
pīpī. 1. a. Half-grown, not matured. He iwi pipi. ‖ kōpīpī.
2. Yielding, flabby. Heretaunga upoko pipi (P.).
3. n. The young fighting men of an army, vanguard.
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4. v.i. Chirp, squeak.
whakapīpī, v.i. Make a chirping noise to allure birds.
Williams Dictionary
Pi (iii). 1. v.t. Slight, take no notice of. Kaua e pihia aku whakaaro e koe. Titiro pi, look askance. I titiro pi mai ki a au te tangata nei.
2. n. Corner of the eye or mouth. Sometimes in full, pi o te kanohi.
3. Eye. Haere kau aku pi, inamata kua kite au i te tangata e tapapa ana i te taha o te motu.
‖ Ta. pi, the custom of avoiding the use of a word which forms or suggests the name of a chief.
Williams Dictionary