1. safe from danger, harm, or loss
2. firmly fixed or fastened; not likely to move or fall
3. confident and free from worry or doubt

1. to make safe or protect from danger
2. to fasten or attach firmly
3. to obtain or achieve something

Examples

• The jewelry is secure in the bank vault.
• Make sure the ladder is secure before climbing.
• She felt secure in her new job.
• The guards will secure the building tonight.
• Please secure your seatbelt before takeoff.
• The team worked hard to secure victory.
• He managed to secure funding for his project.
• The rope must be secure before we start climbing.