a device that uses either a system of wires along which electrical signals are sent or a system of radio signals to make it possible for you to speak to someone in another place who has a similar device, a smartphone

on the phone, hang up the phone, phone tag

Formal and Informal Expressions of phone

In different contexts, you can replace 'phone' with suitable alternatives. In a more formal setting, 'telephone' is apt. In informal speech or writing, 'cell, mobile' is a commonplace synonym.

phone: Explore its Definition & Usage

phone Definition

1a device that uses either a system of wires along which electrical signals are sent or a system of radio signals to make it possible for you to speak to someone in another place who has a similar device
2a smartphone

Using phone: Examples

Take a moment to familiarize yourself with how "phone" can be used in various situations through the following examples!

Example
I'll call you on the phone later.
Example
She's always on her phone.
Example
He dropped his phone and cracked the screen.
Example
I need to buy a new phone plan.

phone Synonyms and Antonyms

Synonyms for phone

telephone
cellphone
mobile phone
smartphone

Phrases with phone

on the phone
speaking to someone on the telephone
Example
I was on the phone with my boss for an hour.
hang up the phone
end a phone call by putting the receiver back in its cradle or pressing a button on the phone
Example
I had to hang up the phone because I had another call coming in.
phone tag
a situation in which two people try to talk on the phone but keep missing each other's calls
Example
We played phone tag for hours before finally connecting.

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Summary: phone in Brief

A 'phone' [fohn] is a device that allows communication between two people in different locations. It can be wired or wireless, and includes smartphones. Common phrases include 'on the phone,' 'hang up the phone,' and 'phone tag.'