This is the 3657th most frequent French word.
mondiale
"Mondiale" means "global" or "worldwide" in English.
Here, 'mondiale' is an adjective meaning 'worldwide' or 'global,' describing the noun 'paix' (peace).
La paix mondiale est un objectif important.
World peace is an important goal.
In this sentence, 'mondiale' serves as an adjective modifying 'guerre' (war), indicating its international scope.
La première guerre mondiale a changé l'histoire.
The First World War changed history.
Here, 'mondiaux' (the plural form corresponding to 'mondiale') refers to issues (enjeux) of global relevance.