From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( n.) Ivory; the tusk of the elephant.

(2): ( n.) A mammal of the order Proboscidia, of which two living species, Elephas Indicus and E. Africanus, and several fossil species, are known. They have a proboscis or trunk, and two large ivory tusks proceeding from the extremity of the upper jaw, and curving upwards. The molar teeth are large and have transverse folds. Elephants are the largest land animals now existing.

Hastings' Dictionary of the Bible [2]

Elephant .   Job 40:16 AVm [Note: Authorized Version margin.] , but RVm [Note: Revised Version margin.] correctly ‘hippopotamus’ (see Behemoth). The use of elephants in warfare is frequently noticed in the Books of Maccabees ( e.g. 1Ma 3:34; 1Ma 6:30; 1Ma 8:6; 1Ma 11:56 , 2Ma 11:4; 2Ma 13:15 ). See also Ivory.

Morrish Bible Dictionary [3]

This is found only in the margin of the A.V. for 'Behemoth' in  Job 40:15; and in 'elephants' teeth' for 'ivory' in  1 Kings 10:22; 2Chr. 9:21: of.  Revelation 18:1,2 . See Ivory

Easton's Bible Dictionary [4]

 Revelation 18:12 1 Kings 10:22  2 Chronicles 9:21

Kitto's Popular Cyclopedia of Biblial Literature [5]

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [6]

( Ἐλέφας ) does not occur in the text of the canonical Scriptures of the A. V., except in the adj. Ἐλεφάντινος , "of ivory,"  Revelation 18:12. But the animal is believed to be referred to in the Hebrew שֶׁנְאּהַבִּים , Elephant'S Tooth, i.e., "ivory,"  1 Kings 10:22; <

International Standard Bible Encyclopedia [7]

el´ē̇ - fant (  Job 40:15 the King James Version margin, the American Revised Version, margin "hippopotamus," the Revised Version (British and American) "ivory");   1 Kings 10:22 the King James Version margin;   2 Chronicles 9:21 the King James Version; 1 Macc 3:34; 6:28ff; 8:6): Possibly in Job it is the extinct mammoth. See Behemoth; Ivory .

The Nuttall Encyclopedia [8]

A genus of mammals, of which there are two species, the Indian and the African; the latter attains a greater size, and is hunted for the sake of its tusks, which may weigh as much as 70 lbs.; the former is more intelligent, and easily capable of being domesticated; the white elephant is a variety of this species.