Generally not gradable; comparative and superlative forms are rare and non-standard.
She did an ace job on the project, impressing everyone with her skills.
Elle a fait un travail excellent sur le projet, impressionnant tout le monde par ses compétences.
He came out as ace during college.
Il s’est révélé asexuel pendant ses études universitaires.
Informal British/Australian exclamation of approval or excitement.
"Ace! We got the tickets after all."
"Génial ! On a finalement obtenu les billets."