adjective. 1Decisive or critical, especially in the success or failure of something. 'Bad management and bad cost control will be crucial in deciding success or failure.

Does crucial mean good?

Crucial means extremely important or involving an extremely important decision or course of action.

What does crucial mean in slang?

(slang, chiefly Jamaica) Term of approval, particularly when applied to reggae music. Delbert Wilkins is the most crucial pirate radio DJ in Brixton. adjective. 3.