From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( v. t.) To mark or designate with an obelisk.

(2): ( n.) An upright, four-sided pillar, gradually tapering as it rises, and terminating in a pyramid called pyramidion. It is ordinarily monolithic. Egyptian obelisks are commonly covered with hieroglyphic writing from top to bottom.

(3): ( n.) A mark of reference; - called also dagger [/]. See Dagger, n., 2.

Holman Bible Dictionary [2]

 Jeremiah 43:13On

Hastings' Dictionary of the Bible [3]

Obelisk . See Pillar, 2 ( c ).

International Standard Bible Encyclopedia [4]

ob´ḗ - lisk , ob´el - isk  : A sacred stone or maccēbhāh . For maccēbhāh the Revised Version (British and American) has used "pillar" in the text, with "obelisk" in the margin in many instances (  Exodus 23:24;  Leviticus 26:1;  Deuteronomy 12:3;  1 Kings 14:23;  Hosea 3:4;  Hosea 10:1 ,  Hosea 10:2 , etc.), but not consistently (e.g.  Genesis 28:18 ). See Pillar .

The Nuttall Encyclopedia [5]

A tall four-sided pillar, generally monolithic, tapering to a pyramidal pointed top, erected in connection with temples in Egypt, and inscribed all over with hieroglyphs, and in memorial, as is likely, of some historical personage or event; they are of ancient date.