ruler meaning
EN
[ˈɹuːlə(ɹ)] [ˈɹuːlɚ] [-uːlə(ɹ)] 
US WRuler
- A ruler, sometimes called a rule or line gauge, is an instrument used in geometry, technical drawing, printing, engineering and building to measure distances or to rule straight lines.
- NounPLrulersSUF-er
- A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a rule; a straightedge with markings; a measure.
- A person who rules or governs; a person who exercises dominion or controlling power over others.
- A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a rule; a straightedge with markings; a measure.
- VerbSGrulersPRruleringPT, PPrulered
- (transitive) To beat with a ruler (as a traditional school punishment).
- (transitive) To beat with a ruler (as a traditional school punishment).
Definition of ruler in English Dictionary
- Part-of-Speech Hierarchy
- Morphemes
- Suffixes
- Words by suffix
- Words suffixed with -er
- Words suffixed with -er
- Words by suffix
- Suffixes
- Nouns
- Countable nouns
- Agent nouns
- Countable nouns
- Verbs
- Transitive verbs
- Transitive verbs
- Morphemes
Source: Wiktionary
Grammatically, this word "ruler" is a morpheme, more specifically, a suffixe. It's also a noun, more specifically, a countable noun and an agent noun. It's also a verb, more specifically, a transitive verb.