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Definition of lossless

lossless

/ˈlɔːs.ləs/
loss · less
Adverb:losslessly
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lossless Lexical Profile

lossless Game Scores & Validity

• adjective

1

Designating a method of data compression in which the original digital file can be perfectly reconstructed from the compressed data without any degradation in quality or loss of information.

Example

"The sound engineer archived the studio recordings in a lossless audio format to preserve every detail of the performance."

2

Involving or occurring without any dissipation or loss of energy, electrical power, or signal strength (especially in physics and engineering).

Example

"To simplify the initial calculations, the physicist modeled the circuit using an ideal, lossless transmission line."

Synonyms
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Antonyms
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Word Nuance & Usage

In digital media and computing, "lossless" contrasts directly with "lossy" compression; lossless formats (such as FLAC or PNG) preserve 100% of the original data, whereas lossy formats (such as MP3 or JPEG) permanently discard data to achieve smaller file sizes.

• Rhymes for lossless

• Nearby Words

loser
losings
loss
lossless
lossmaker
lossmaking
lossy

Cite this Entry

Wordmom. (2026). Definition of Lossless. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/lossless
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