1. in a way that is characteristic of or peculiar to a particular language, dialect, or group; using idioms or expressions natural to native speakers
Usage: commonly used in linguistics, translation, and language learning contexts
2. in a manner that conforms to the style, conventions, or typical patterns of a particular art form, musical genre, or discipline
Usage: used in music, art, and performance contexts

Examples

• She spoke English idiomatically, using phrases that only native speakers would naturally say.
• The translator rendered the poem idiomatically rather than word-for-word to preserve its meaning.
• He played the jazz piece idiomatically, capturing the authentic feel of the genre.
• To write idiomatically in French, you must learn common expressions, not just grammar rules.
• The actor delivered the dialogue idiomatically, making it sound like real conversation.
• Idiomatically speaking, 'it's raining cats and dogs' means heavy rain, not literal animals falling from the sky.