Boyd’s Bible Dictionary:

(sung). (1) Son of Salu, a prince of Simeon slain by Phinehas (Num. 25:6-15). (2) Captain of half the chariots under Elah king of Israel. He smote his master in Tirsah, and reigned in his stead for a period of seven days, B. C. 929 (1 Kings 16:8-18). (3) A son of Zerah, of Judah (1 Chron. 2:6). Zabdi (Josh. 7:1,17-18). (4) Son of Jehoadah and a descendant of Saul (1 Chron. 8:36; 9:42). (5) An obscure name mentioned (Jer. 25:25).

Concise Bible Dictionary:

1. Son of Salu, a Simeonite: with a Midianitish woman he was slain by Phinehas (Num. 25:14).
2. A captain of Elah king of Israel: he conspired and slew the king and all his family, and usurped the throne. He was speedily attacked by Omri, but Zimri retreated into the late king’s palace, set it on fire, and perished in the flames (1 Kings 16:9-20; 2 Kings 9:31).
3. Son of Zerah, a son of Judah (1 Chron. 2:6).
4. Son of Jehoadah, a Benjamite (1 Chron. 8:36; 1 Chron. 9:42).
5. An unknown place or tribe mentioned among the nations to be destroyed (Jer. 25:25).

Strong’s Dictionary of Hebrew Words:

from 2167; musical; Zimri, the name of five Israelites, and of an Arabian tribe
KJV Usage:

Jackson’s Dictionary of Scripture Proper Names:

my psalm

Potts’ Bible Proper Names:

Song, or praise, of God; musical; my field:―name of five Israelites, and of an Arabian tribe, 1 Chron. 2:6. {Cantio Domini}