blackline
noun, verb
blackline is spelled B-L-A-C-K-L-I-N-E: 9 letters. It appears about once in every 40 million words in written English, the 194,306th most frequent word form (wordfreq, 2021 data). As a noun, blackline means “A document indicating the differences between two versions of another document” (English Wiktionary, September 2026). The plural of blackline is blacklines.
How many letters and syllables are in blackline?
| Letters | 9: B-L-A-C-K-L-I-N-E |
|---|---|
| In writing | about once in every 40 million words; the 194,306th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is blackline?
Blackline appears about once in every 40 million words in written English, the 194,306th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Forms of blackline
- blacklines plural, present, singular, he/she/it
- blacklining participle, present
- blacklined participle, past
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does blackline mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A document indicating the differences between two versions of another document.
- 2
A line of deliberately burned material created to stop the advance of a larger fire.
verb
- 1
To compare versions of (a document) by this method.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does blackline come from?
From black + line; compare redline, greenline.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).