To write one's name on a document as a form of identification or approval.

हस्ताक्षर करना

English Usage: Please sign the contract before you leave.

Hindi Usage: कृपया जाने से पहले अनुबंध पर हस्ताक्षर करें।

To record one's entrance or participation in a system, typically a website or service.

लॉग इन करना

English Usage: You need to sign in to access your account.

Hindi Usage: अपने खाते तक पहुँचने के लिए आपको लॉग इन करना होगा।

An indication or gesture representing something.

संकेत

English Usage: The sign on the door indicates that it is closed.

Hindi Usage: दरवाजे पर लगा संकेत बताता है कि यह बंद है।