Standard Lemma guide

lossless

adj · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • UK: /ˈlɒs.ləs/
  • US: Recorded audio is listed in the source snapshot.

1

adj

Meaning 1

Free from loss, especially not losing electrical energy or force.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Not losing information.

Definition source: English Wiktionary via Wiktextract

Topics: computing, engineering, information-theory, mathematics, natural-sciences, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adjective

Meaning 3

characterized by or causing no dissipation of energy

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: lossy

History

Etymology

Etymology tree English loss Proto-Indo-European *lewh1- Proto-Indo-European *lewHs-der. Proto-Germanic *leusaną Proto-Germanic *lausaz Proto-Germanic *-lausaz Proto-West Germanic *-laus Old English -lēas Middle English -les English -less English lossless From loss + -less.

Across languages

Translations

9 source translations are retained for this English entry.

  • Chinese Mandarin: 無損 /无损 (wúsǔn) — not losing information
  • Czech: bezeztrátový — not losing information
  • Finnish: häviötön — not losing information
  • Georgian: უდანაკარგო (udanaḳargo) — not losing information
  • German: verlustfrei — not losing information
  • Hungarian: veszteségmentes — not losing information
  • Japanese: ロスレス (rosuresu) — not losing information
  • Polish: bezstratny — not losing information
  • Swedish: förlustfri — not losing information
Real reading context

lossless in complete knowledge articles