Third-person singular simple present indicative form of sign on

present participle of sign on

(transitive, now rare) To seal (a document etc.) with an identifying seal or symbol. / (transitive) To mark, to put or leave a mark on.

The symbol @, most commonly used in e-mail addresses.

(sometimes also used uncountably) A perceptible (e.g. visible) indication. / (Canada, US, Australia, uncountable) Physical evidence left by an animal.

present participle of sign

(idiomatic) To sign one's name on a list when entering a place, to indicate one's arrival. / (computing) To take some action to access a secured program or web page on a computer; to log in.

The act of concluding a contract, especially by an athlete or entertainer with a company. / (by extension) A player signed by a sporting organization.

plural of sign

Third-person singular simple present indicative form of sign