Free from danger or attack: a secure fortress. Free from risk of loss; safe: Her papers were secure in the vault. Free from the risk of being intercepted or listened to by unauthorized persons: Only one telephone line in the embassy was secure. Free from fear, anxiety, or doubt. Not likely to fail or give way; stable: a secure stepladder. Firmly fastened: a secure lock. Reliable; dependable: secure investments. Assured; certain: With three goals in the first period they had a secure victory, but somehow they lost. Archaic Careless or overconfident. To guard from danger or risk of loss: The troops secured the area before the civilians were allowed to return. To make firm or tight; fasten. See Synonyms at fasten. To make certain; ensure: The speaker could not secure the goodwill of the audience. To guarantee payment of (a loan, for example). To guarantee payment to (a creditor). To get possession of; acquire: secured a job. To capture or confine: They secured the suspect in the squad car. To bring about; effect: secured release of the hostages. To protect or ensure the privacy or secrecy of (a telephone line, for example).