ultimo Meaning, Definition & Usage

  1. adjective satellite in or of the month preceding the present one
    ult.
    • your letter received on the 29th ult

WordNet

Ul"ti*mo
Etymology
L. ultimo (mense) in the last month.
Definitions
  1. In the month immediately preceding the present; as, on the 1st ultimo; -- usually abbreviated to ult. Cf. Proximo.

Webster 1913