overriding
adj.adj. more important than anything else in a situation. You use this to describe the main reason or goal that decides what happens.
adj. more important or significant than all other considerations; having priority or dominance. Often used to describe a primary motive, concern, or principle that dictates a course of action.
Their overriding concern is the safety of the children.
Despite several minor technical issues, the overriding factor in the project's success was the team's ability to communicate.
The court ruled that the state's interest in public health was the overriding principle, even when it conflicted with individual property rights in this specific instance.
Typically used attributively before a noun to indicate priority or dominance.