What is the meaning of Primero?

An card game resembling poker, dating back at least to the 16th century.

neuter of primeru

first

former (in contrast to the latter), first, first one

one of the five bids in the card game of Primero, consisting of a combination of four cards in the hand

first, first up

top (head)

chief, fundamental

prime, initial, front

first, first of all, firstly

masculine of primera

Source: wiktionary.org