Definition of counter noun in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. As they entered the main door on Fifth Avenue, the guard clicked off two numbers on his people counter. Konigsburg coun·ter ˈkau̇n-tər We countered that our warnings had been ignored. Want to learn more? (especially in compounds) an electronic device for. Look up counter in Wiktionary, the free dictionary. He's only 16 months, but is already a good counter – he can count to 100. The basic idea is that the researcher conducting the transect (called the counter or enumerator) walks along a set path at certain intervals. Also found in: Thesaurus, Medical, Legal, Financial, Acronyms, Idioms, Encyclopedia, Wikipedia. Sports A fencing parry in which one.