gaja : [m.] an elephant.

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

Gaja [Sk. gaja] an elephant J iv.494; Miln 2, 346; DhsA 295 (appld to a kind of thought).
   -- potaka the young of an elephant PvA 152; -- rājā the king of the elephants Miln 346.

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

gaja m. an elephant ṢaḍvBr. v, 3 Mn. &c. (ifc. f. ā R. ii, 57, 7)
• (= dig-g○) one of the 8 elephants of the regions W.
• (hence) the number 'eight' Sūryas.
• a measure of length (commonly Gaz, equal to two cubits = 1 3/4 Or 2 Hastas) L.
• a mound of earth (sloping on both sides) on which a house may be erected Jyot.
• = -puṭa, q.v
• (in music) a kind of measure
• N. of a man MBh. vi, 3997
• of an Asura (conquered by Śiva) KāśīKh. lxviii
• of an attendant on the sun L.
• (ā), f. = -viithi VarBṛS. ix, 1 ff. Sch.
• (ī), f. a female elephant BhP. iv, 6, 26 ; x, 33, 23

Sanskrit-English Dictionary, by M. Monier William