simple past tense and past participle of sign in

simple past tense and past participle of sign on

Having a signature; endorsed. / (mathematics, computer science) Having both positive and negative varieties. / (of a road, route) Furnished with signs and signposts; signposted.

simple past tense and past participle of sign

present participle of sign in

Third-person singular simple present indicative form of sign in

Third-person singular simple present indicative form of sign on

present participle of sign 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.