Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun telephone_extension

1 sense of telephone extension

Sense 1
extension, telephone extension, extension phone -- (an additional telephone set that is connected to the same telephone line)
       => telephone, phone, telephone set -- (electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds; "I talked to him on the telephone")