DC — Difficulty Class
The target number used to decide whether an attempt succeeds: your roll plus modifiers must reach it.
A Difficulty Class (DC) is how hard a task is. You roll, add your modifiers, and compare the total with the DC. An easy task might be 10, a hard one 20. Checks and saving throws use a DC. Attacks use the target's Armor Class (AC) instead. Sometimes the DC is kept hidden from players.
In Fantasy RPG
Fantasy RPG: a total equal to or higher than the DC succeeds.