The difference between Radio and Tuner
When used as nouns, radio means the technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves, whereas tuner means a person who tunes a piano or organ.
Radio is also verb with the meaning: to use two-way radio to transmit (a message) (to another radio or other radio operator).
check bellow for the other definitions of Radio and Tuner
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Radio as a noun (uncountable):
The technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves.
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Radio as a noun (countable):
A device that can capture (receive) the signal sent over radio waves and render the modulated signal as sound.
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Radio as a noun (countable):
On-board entertainment system in a car, usually including a radio receiver as well as the capability to play audio from recorded media.
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Radio as a noun (countable):
A device that can transmit radio signals.
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Radio as a noun (Internet, uncountable):
The continuous broadcasting of sound recordings via the Internet in the style of traditional radio.
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Radio as a verb (ambitransitive):
To use two-way radio to transmit (a message) (to another radio or other radio operator).
Examples:
"I think the boat is sinking; we'd better radio for help.'' / ''I radioed him already.'' / ''Radio the coordinates this time.'' / ''OK. I radioed them the coordinates."
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Radio as a verb (transitive):
To order or assist (to a location), using telecommunications.
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Tuner as a noun:
A person who tunes a piano or organ.
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Tuner as a noun:
A device, electronic or mechanical, that helps a person tune a musical instrument by showing the deviation of the played pitch from the desired pitch.
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Tuner as a noun:
On a musical instrument, a peg or mechanical device that changes the tension, and hence pitch, of a string.
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Tuner as a noun:
The component of an audio system that receives radio broadcasts.
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Tuner as a noun (archaic):
One who sings or makes music.
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Tuner as a noun (entertainment industry):
A musical.