adj
Meaning 1
Lacking the sense of hearing; deaf.
Definition source: English Wiktionary via Wiktextract
Usage: obsolete
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Standard Lemma guide
surd
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.
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Australian, Received-Pronunciation: /sɜːd/
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Southern-England: Recorded audio is listed in the source snapshot.
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US: sûrd
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US: /sɝd/
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Scotland: /sʌɹd/
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New-Zealand: /søːd/
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/seːd/ Liverpool, fair–fur merger
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/sɛːd/ Humberside, Teesside, fair–fur merger
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rhymes with -ɜː(ɹ)d
adj
Meaning 2
unheard
Definition source: English Wiktionary via Wiktextract
Usage: obsolete
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
adj
Meaning 3
Involving surds, or irrational numbers; not capable of being expressed in rational numbers.
Definition source: English Wiktionary via Wiktextract
Topics: mathematics, sciences
Examples
- a surd expression or quantity; a surd number
Meaning relationships
Synonyms: none provided
Antonyms: none provided
adj
Meaning 4
unvoiced; voiceless
Definition source: English Wiktionary via Wiktextract
Topics: human-sciences, linguistics, phonetics, phonology, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: sonant
noun
Meaning 5
An irrational number, especially one expressed using the √ symbol.
Definition source: English Wiktionary via Wiktextract
Topics: arithmetic
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
noun
Meaning 6
A voiceless consonant.
Definition source: English Wiktionary via Wiktextract
Topics: human-sciences, linguistics, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: sonant
adjective
Meaning 7
produced without vibration of the vocal cords
Definition source: Princeton WordNet 3.0
Examples
- unvoiced consonants such as `p' and `k' and `s'
Meaning relationships
Synonyms: unvoiced, voiceless, hard
Antonyms: none provided
noun
Meaning 8
a consonant produced without sound from the vocal cords
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: voiceless consonant
Antonyms: none provided
Broader terms: consonant
History
Etymology
First attested in the mid 16th century from Latin surdus (“deaf, mute”), used in mathematics for “irrational,” reflecting ἄλογος (álogos, “irrational, speechless”) as found in Euclid, apparently transmitted via Arabic جِذْر أَصَمّ (jiḏr ʔaṣamm, “deaf root”). The phonetic sense, “voiceless,” emerged in the 18th century. Doublet of surdo.