Lexical Definition

‎אוּל‎ ʼûwl (ool) strength H:N-M
from an unused root meaning to twist, i.e. (by implication) be strong

mighty, strength.

1) prominence
1a) body, belly (contemptuous)
1b) nobles, wealthy men

Brown-Driver-Briggs

I. [‎אוּל‎] noun [masculine] body, belly; suffix ‎אוּלָם‎ (in contempt) Ps 73:4 (literally their front, prominent part).

II. [‎אוּל‎] noun [masculine] leading man, noble; plural construct ‎אוּלֵי הָאָרֶץ‎ 2Kgs 24:15 Kt (Qr ‎אֵילֵי‎ see [III. ‎איל‎]).

Brown-Driver-Briggs References

Book Refs
2 Kings 24:15
Psalms 73:4