Standard Lemma guide

isobar

noun · 4 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.

No pronunciation record was provided for this word.

1

noun

Meaning 1

A line drawn on a map or chart connecting places of equal or constant pressure.

Definition source: English Wiktionary via Wiktextract

Topics: climatology, meteorology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A set of points or conditions at constant pressure.

Definition source: English Wiktionary via Wiktextract

Topics: natural-sciences, physical-sciences, physics, thermodynamics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Either of two nuclides of different elements having the same mass number.

Definition source: English Wiktionary via Wiktextract

Qualifier: nuclear physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

(meteorology)an isogram connecting points having equal barometric pressure at a given time

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: isogram, isopleth, isarithm

History

Etymology

From Ancient Greek ἴσος (ísos, “equal”) + βάρος (báros, “weight”), equivalent to iso- + bar-.

Across languages

Translations

38 source translations are retained for this English entry.

  • Catalan: isòbar — line on a map connecting places of equal pressure
  • Dutch: isobaar — line on a map connecting places of equal pressure
  • Esperanto: izobaro — line on a map connecting places of equal pressure
  • Finnish: isobaari — line on a map connecting places of equal pressure
  • French: isobare — line on a map connecting places of equal pressure
  • Galician: isobara — line on a map connecting places of equal pressure
  • German: Isobare — line on a map connecting places of equal pressure
  • Greek: ισοβαρής (isovarís) — line on a map connecting places of equal pressure
  • Greek: ισοβαρής καμπύλη (isovarís kampýli) — line on a map connecting places of equal pressure
  • Hebrew: איזובר (izobár) — line on a map connecting places of equal pressure
  • Hindi: समदाब रेखा (samdāb rekhā) — line on a map connecting places of equal pressure
  • Icelandic: þrýstilína — line on a map connecting places of equal pressure
  • Ido: izobaro — line on a map connecting places of equal pressure
  • Indonesian: isobar — line on a map connecting places of equal pressure
  • Irish: iseabar — line on a map connecting places of equal pressure
  • Italian: isobara — line on a map connecting places of equal pressure
  • Latvian: izobāra — line on a map connecting places of equal pressure
  • Macedonian: изобара (izobara) — line on a map connecting places of equal pressure
  • Māori: pae pēhanga — line on a map connecting places of equal pressure
  • Māori: hua pēhanga — line on a map connecting places of equal pressure
  • Polish: izobara — line on a map connecting places of equal pressure
  • Russian: изоба́ра (izobára) — line on a map connecting places of equal pressure
  • Tagalog: guhit ng kadiin — line on a map connecting places of equal pressure
  • French: isobare — (thermodynamics) set of points at constant pressure
  • Italian: isobara — (thermodynamics) set of points at constant pressure
  • Polish: izobara — (thermodynamics) set of points at constant pressure
  • Tagalog: kadiin — (thermodynamics) set of points at constant pressure
  • Czech: izobar — either of two nuclides
  • French: isobare — either of two nuclides
  • German: Isobar — either of two nuclides
  • Hebrew: איזובר (izobár) — either of two nuclides
  • Hindi: समभारिक (sambhārik) — either of two nuclides
  • Irish: iseabar — either of two nuclides
  • Italian: nuclide isobaro — either of two nuclides
  • Italian: isobaro — either of two nuclides
  • Polish: izobara — either of two nuclides
  • Russian: изоба́р (izobár) — either of two nuclides
  • Tagalog: kadiin — either of two nuclides
Real reading context

isobar in complete knowledge articles