Third-person singular simple present indicative form of sign on

To sign one's name as an indication that one is leaving some location; to take some action to indicate one is leaving a secured program or web page on a computer. / To signal.

simple past tense and past participle of sign out

present participle of sign off

Third-person singular simple present indicative form of sign off

present participle of sign on

(historical) A pigment formed from gold and tin salts, used in glassmaking.

simple past tense and past participle of sign on

(transitive) To incorporate (something extra, often an amount of money) into something else (often a bill). / (intransitive) To put an expansion onto a building, usually a home.

Alternative form of add-on