Word Pronunciation & Dictionary

regular open

Word Rarity Uncommon

Frequency: Zipf frequency 4.84 in modern English

Syllables: reg-u-lar open
IPA

14

Scrabble Score

11

Letters

3

Syllables

9

Unique Chars

Meaning

adj

Being the interior of its closure.

Example Sentences

"The set (0,1)∪(1,2) is open, but is not regular open, because its closure is [0,2], so the interior of its closure is (0,2)."

Etymology

From regular + open; apparently a backformation from regular open set.

Phrases

regular closed

Frequently Paired Words

regular closed

Questions

What does regular open mean?: Being the interior of its closure.
Where does regular open come from?: From regular + open; apparently a backformation from regular open set.

How to pronounce regular open

Open the pronunciation page — Open the Speakur entry for “regular open”.
Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
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Repeat and practice — Say “regular open” aloud, matching stress and vowels until it feels natural.