sakkāya: 'existing group'. 'this word is usually translated by 'personality', but according to the commentaries it corresponds to sat-kāya, 'existing group', hence not to Sanskrit sva-kāya, 'own group' or 'own body'. In the Suttas (e.g. M. 44) it is said to be a name for the 5 groups of existence (khandha): "Sakkāya, o Brother Visākha, is said by the Blessed One to be a name for the 5 'groups as objects of clinging' (upādāna-kkhandha), to wit: corporeality, feeling, perception, mental formations, and consciousness."

Buddhist Dictionary, Manual of Buddhist Terms and Doctrines, by NYANATILOKA MAHATHERA

薩迦耶

sakkāya : [m.] the existing body.

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

Sakkāya [sat+kāya, cp. BSk. satkāya Divy 46; AvŚ i.85. See on expln of term Mrs. Rh. D. in J.R.A.S. 1894, 324; Franke Dīgha trsln p. 45; Geiger P.Gr. § 241; Kern. Toev. ii.52] the body in being, the existing body or group (= -- nikāya q. v.); as a t.t. in P. psychology almost equal to individuality; identified with the five khandhas M i.299; S iii.159; iv.259; A ii.34; Th 2, 170, 239; DhsA 348. See also D iii.216 (cp. Dial. iii.2161); A iii.293, 401; Nd1 109.
   -- diṭṭhi theory of soul, heresy of individuality, speculation as to the eternity or otherwise of one's own individuality M i.300=iii.17=DhS 1003, S iii.16 sq. In these passages this is explained as the belief that in one or other of the khandhas there is a permanent entity, an attā. The same explanation, at greater length, in the Diṭṭhigata Sutta (Ps i.143 -- 151). As delusions about the soul or ghost can arise out of four sorts of bias (see abhinivesa) concerning each of the five khandhas, we have twenty kinds of s˚ diṭṭhi: fifteen of these are kinds of sakkāya -- vatthukā sassata -- diṭṭhi, and five are kinds of s˚ -- vatthukā uccheda -- diṭṭhi (ibid. 149, 150). Gods as well as men are s˚ pariyāpannā S iii.85; and so is the eye, DhsA 308. When the word diṭṭhi is not expressed it is often implied, Th 2, 199, 339; Sn 231. S˚ diṭṭhi is the first Bond to be broken on entering the Path (see saŋyojana); it is identical with the fourth kind of Grasping (see upādāna); it is opposed to Nibbāna, S iv.175; is extinguished by the Path, M i.299; S iii.159; iv.260; and is to be put away by insight DhsA 346. -- See further: D iii.234; A iii.438; iv.144 sq.; Kvu 81; Sn 950; Dhs 1003; and on term Dhs. trsln § 1003; K.S. iii.80, n. 3. -- nirodha the destruction of the existing body or of individuality A ii.165 sq.; iii.246; D iii.216. -- samudaya the rise of individuality D iii.216; Nd1 109.

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