Princeton's WordNet

1. pianist, piano player(noun)

   a person who plays the piano

Kernerman English Learner's Dictionary

1. pianist(noun)ˈæn ɪst, ˈpyæn-, ˈpi ə nɪst

   sb who plays the piano

Wiktionary

1. pianist(Noun)

   A person who plays the piano, particularly with skill or as part of an orchestra.

2. pianist(Noun)

   A spy using radio or wireless telegraphy to keep in touch with headquarters during the Second World War

Origin: From pianiste, from pianista. Also pian(o) + -ist.

Webster Dictionary

1. Pianist(noun)

   a performer, esp. a skilled performer, on the piano

• klavierspelerAfrikaans
• عازِف البيانوArabic
• пианистBulgarian
• pianistaPortuguese (BR)
• klavíristaCzech
• der/die Pianist(in)German
• pianistDanish
• πιανίσταςGreek
• pianistaSpanish
• pianistEstonian
• پیانیستFarsi
• pianistiFinnish
• pianisteFrench
• פְּסַנתרָןHebrew
• पियानो वाद्यकHindi
• pijanistCroatian
• zongoristaHungarian
• pianisIndonesian
• píanóleikariIcelandic
• pianistaItalian
• ピアニストJapanese
• 피아노연주자Korean
• pianistasLithuanian
• pianistsLatvian
• pemain pianoMalay
• pianistDutch
• pianistNorwegian
• pianistaPolish
• پیانیستPersian
• پيانو غږونكىPashto
• pianistaPortuguese
• pianistRomanian
• пианистRussian
• klavíristaSlovak
• pianistSlovenian
• pijanistaSerbian
• pianistSwedish
• นักเปียโนThai
• piyanistTurkish
• 鋼琴演奏家Chinese (Trad.)
• піаністUkrainian
• پيانو نوازUrdu
• nghệ sĩ pianôVietnamese
• 钢琴演奏家Chinese (Simp.)