Amplifier – Definition & Meaning

Amplifiers are electronic devices that are used to amplify or increase the strength of an electrical signal. They are commonly used in audio systems, televisions, radios, and other electronic devices. Amplifiers are essential components in modern electronics, and they play a crucial role in the transmission and reception of signals.


An amplifier is an electronic device that increases the power of a signal. It does this by taking a weak signal and boosting it to a higher level. Amplifiers are used in a variety of applications, including audio systems, radio and television broadcasting, and telecommunications.


The first amplifiers were developed in the early 20th century, and they were used primarily in radio and telephone systems. The invention of the vacuum tube in the 1920s made it possible to build more powerful and efficient amplifiers. In the 1950s and 1960s, the development of the transistor revolutionized the electronics industry, and it paved the way for the development of smaller, more efficient amplifiers.

Meaning in different dictionaries

According to the Merriam-Webster dictionary, an amplifier is “an electronic device that amplifies signals, especially audio signals.” The Oxford English Dictionary defines an amplifier as “a device or circuit that increases the power or amplitude of an electrical signal.” The Cambridge Dictionary defines an amplifier as “a piece of electronic equipment that makes sounds or signals louder.”


Amplifiers are often associated with audio systems, such as speakers and headphones. They are also used in radio and television broadcasting, telecommunications, and scientific research. Amplifiers are essential components in many electronic devices, and they play a crucial role in the transmission and reception of signals.


Some synonyms for amplifier include booster, enhancer, and intensifier.


There are no direct antonyms for amplifier, as it is a specific type of electronic device that performs a particular function.

The same root words

The word amplifier is derived from the Latin word amplificare, which means “to enlarge or expand.” The root word ampli- is also found in other words, such as amplify, amplitude, and ample.

Example Sentences

  1. The amplifier made the music sound louder and clearer.
  2. The radio station uses a powerful amplifier to broadcast its signal.
  3. The scientist used an amplifier to measure the strength of the electrical signal.
  4. The amplifier in my stereo system is broken, and I need to get it repaired.
  5. The guitarist plugged his guitar into the amplifier and began to play.
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