buddhatta : [nt.] the state of a Buddha.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Buddhatta (nt.) [abstr. fr. buddha] state of (perfect) enlightenment, (attainment of) Buddhahood J iii 363 (sabbadhammānaŋ b.); Vism 209 (buddhattā Buddho); Mhbv 12. Cp. buddhatā and abhisambuddhatta.

Pali-English Dictionary, TW Rhys Davids, William Stede,