Word
ruler
US/ˈɹuɫɝ/
UK/ɹˈuːlɐ/
Definitions
01measuring tool
A1 · Beginner Countable noun
n. a flat, straight tool used for measuring length or drawing straight lines.
n. a rigid, flat instrument with marked graduations used for measuring linear distance or as a straightedge.
日本語:定規、支配者※
“Use a ruler to make sure the line is exactly ten centimetres long.”
“The student used a wooden ruler to measure the dimensions of the specimen before sketching it in her notebook.”
Synonyms
02leader
A2 · Elementary Countable noun
n. a person who has the power to control a country or group, like a king or queen.
n. a person who exercises supreme authority or dominion over a territory or people.
“The ancient ruler built many beautiful temples during his long reign.”
“Historians often debate whether the ruler was a benevolent visionary or a tyrant who prioritised expansion over the welfare of his subjects.”
03to hit with a ruler
C2 · Proficiency Archaic
v. to hit someone with a ruler as a punishment.
v. to strike a person, typically a student, with a ruler as a form of corporal punishment.
“In the old days, teachers might ruler a student for being late.”
“The memoir describes a harsh Victorian classroom where the master would ruler any child who failed to recite their verses perfectly.”
Usage
This verb is transitive and takes a direct object, usually a person.
Teaching tip
This sense is archaic and refers to historical school discipline; it is not used in modern educational contexts.
Etymology
From Middle English reuler; equivalent to rule + -er.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Word family
NOUN
Related words
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A1 MoversIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.2.0–3.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 1.0–1.50–23TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.120–224
- Frequency
- Frequent
- Level
- A1 · Beginner
- Updated
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QR code
englishreference.com/q/ruler
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「日本語」 data: JMdict (EDRDG), CC BY-SA 4.0