Answer: Secure means protected from danger or harm, or free from risk or worry; it can also mean to make something safe or guaranteed. Definitions and nuances

• Protection from danger: For example, a secure network is guarded against intruders; a secure home keeps residents safe [Britannica definition 1a; Cambridge definition].
• Safe and confident state: Feeling free from worry or doubt is another sense of secure, as in being secure about one’s place or future [Merriam-Webster definition 1d].
• Guarantee or fixation: To secure something can also mean to guarantee payment or to fasten something firmly in place [Merriam-Webster, Cambridge; general usage].
• Related forms: secure as a verb can mean to obtain or to make safe, and secured/securely describe how something is fastened or protected [Merriam-Webster; Cambridge].

Common usage examples

• Security for digital systems: “We need to secure the network against hackers.”
• Personal safety: “The area is secure.”
• Financial or organizational stability: “The company aims to secure its market position.”

Quick language tips

• As an adjective: secure = protected or safe; can describe people, places, or systems (e.g., a secure connection, a secure facility).
• As a verb: secure = to obtain, guarantee, or protect (e.g., secure a loan, secure a future).

If you’d like, I can tailor examples to a specific context (tech, travel, personal finances, etc.).