What is the meaning of Pleno?

vocative singular of plena

plenary: fully attended

dative/ablative masculine/neuter singular of plēnus

dative/ablative singular of plēnum

full, entire

broad, open, full, full-fledged

plenary or joint session

full (containing the maximum amount possible)

plenary

fulfilling

in the middle of (a time or space); at the height of; in broad

Source: wiktionary.org