Meaning
denotes (a) "an olive tree," Rom 11:17, Rom 11:24, Rev 11:4 (plural); the Mount of Olives was so called from the numerous olive trees there, and indicates the importance attached to such; the Mount is mentioned in the NT in connection only with the Lord's life on earth, Mat 21:1, Mat 24:3, Mat 26:30, Mar 11:1, Mar 13:3, Mar 14:26, Luk 19:37, Luk 22:39, Joh 8:1; (b) "an olive," Jam 3:12, RV (AV, "olive berries").
<2,,1638, elaion>
"an olive grove" or "olive garden," the ending - on, as in this class of noun, here indicates "a place set with trees of the kind designated by the primitive" (Thayer); hence it is applied to the Mount of Olives, Luk 19:29, Luk 21:37, Act 1:12 ("Olivet"): in the first two of these and in Mar 11:1, some mss. have the form of the noun as in No. 1.
<3,,2565, kallielaios>
"the garden olive" (from kallos, "beauty," and No. 1), occurs in Rom 11:24, "a good olive tree."
<4,,65, agrielaios>
an adjective (from agrios, "growing in the fields, wild," and No. 1), denoting "of the wild olive," is used as a noun in Rom 11:17, Rom 11:24, "a wild olive tree" (RV, in the latter verse).