A person who telephones, especially one who does so for a commercial organization.

plural of telephoner

Using a telephone, by means of a telephone.

(rare) Contactable by telephone.

Of, pertaining to, or transmitted by telephony.

The act of placing a telephone call.

present participle of telephone

(transitive, intransitive) To (attempt to) contact someone using a telephone. / (transitive) To convey (a message) via telephone.

A telecommunication device (originally mechanical, and now electronic) used for two-way talking with another person (now often shortened to phone).

Third-person singular simple present indicative form of telephone