Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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-er1 one that performs or is associated with (such) an action, activity, or thing. [4 definitions]
-er2 used to form the comparative degree of adjectives and adverbs, esp. those of one syllable.
-r1 a variant of -er1.
-r2 variant of -er2.
r the eighteenth letter of the English alphabet.
R1 abbreviation of "restricted; those under eighteen must be accompanied by an adult" (used as a film rating).
R2 abbreviation of "registered trademark" (usu. enclosed in a circle).
r. abbreviation of "right."
R.1 abbreviation of "River."
R.2 abbreviation of "Republican."