A more thorough explanation:

Definition: Adequate; of such quality, number, force, or value as is necessary for a given purpose.

Examples:

• A salary increase of 10% was sufficient to cover the cost of living.
• The evidence presented in court was sufficient to prove the defendant's guilt.
• She had sufficient time to complete the project before the deadline.

The examples illustrate that something that is sufficient is enough or satisfactory for a particular purpose. In the first example, a 10% salary increase was enough to cover the cost of living. In the second example, the evidence presented in court was enough to prove the defendant's guilt. In the third example, she had enough time to complete the project before the deadline.