Princeton's WordNet

1. catch, take in, overhear(verb)

   hear, usually without the knowledge of the speakers

   "We overheard the conversation at the next table"

Kernerman English Learner's Dictionary

1. overhear(verb)ˌoʊ vərˈhɪər

   to hear a conversation that you were not intended to hear

   I overheard two girls talking about the party.

Wiktionary

1. overhear(Verb)

   To hear something that wasn't meant for one's ears.

Origin: From *, from oferhieran, equivalent to . Cognate with overhoren, überhören, overhøre, yfirheyra.

• toevallig hoor, afluisterAfrikaans
• يَسْتَرِق السَّمْعArabic
• дочувамBulgarian
• ouvirPortuguese (BR)
• zaslechnoutCzech
• belauschen, zufällig hörenGerman
• overhøre; komme til at høreDanish
• ακούω κτ. χωρίς να το θέλωGreek
• oír por casualidad, acertar a oírSpanish
• pealt kuulmaEstonian
• شنیدنFarsi
• kuulla sattumaltaFinnish
• entendre (par hasard)French
• לִשמוֹעַ בְּמִקרֶהHebrew
• चुपके से सुननाHindi
• dočutiCroatian
• véletlenül meghallHungarian
• ikut mendengarIndonesian
• heyra (óvart) á tal annarraIcelandic
• (sentire per caso)Italian
• ふと聞くJapanese
• 우연히 듣다Korean
• nugirstiLithuanian
• nejauši dzirdēt; noklausītiesLatvian
• terdengarMalay
• toevallig horenDutch
• overhøre, høre tilfeldigNorwegian
• podsłuchaćPolish
• شنیدنPersian
• اوريدلPashto
• ouvirPortuguese
• a auzi (fără să vrea)Romanian
• нечаянно услышатьRussian
• vypočuťSlovak
• slučajno slišatiSlovenian
• slučajno čutiSerbian
• råka få höra (avlyssna), snappa uppSwedish
• ได้ยินโดยไม่ตั้งใจThai
• kulak misafiri olmak, istemeden dinlemekTurkish
• 無意中聽到的，偷聽Chinese (Trad.)
• випадково почутиUkrainian
• اتفاقاً سن ليناUrdu
• nghe lỏmVietnamese
• 无意中听到的，偷听Chinese (Simp.)