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
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/daɪˈæstəli/
Southern-England:Recorded audio is listed in the source snapshot.
CMU ARPABET:D AY0 AE1 S T AH0 L IY2
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
The phase or process of relaxation and dilation of the heart chambers, between contractions, during which they fill with blood; an instance of the process.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable, usually
Topics: medicine, physiology, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
The lengthening of a vowel or syllable beyond its typical length.
Definition source: English Wiktionary via Wiktextract
1815 March and June, On the Greek and Latin Accents, The Classical Journal, Volume XI, page 81, I have inserted diastole which is omitted in Putschius, an insertion which both the complement, and the subsequent text make necessary.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
The hypodiastole, a textual or punctuation mark formerly used to disambiguate homonyms in Greek.
Definition source: English Wiktionary via Wiktextract