1. the quality or state of being idiomatic; the degree to which an expression follows the patterns and conventions of a particular language rather than being literally translatable.
Usage: linguistics; formal

Examples

• The idiomaticity of the phrase 'raining cats and dogs' makes it difficult for non-native speakers to understand.
• Linguists study idiomaticity to understand how native speakers naturally combine words.
• The high idiomaticity of colloquial expressions often surprises language learners.
• Translators must account for idiomaticity when converting text from one language to another.
• The idiomaticity of English phrasal verbs is one of the most challenging aspects for ESL students.