Reverso Define: An AI -Powered Contextual Dictionary for Professionals (2025)

Abstract: We present Reverso Define, an innovative English dictionary designed to support translation professionals with AI-powered, context-aware definitions. Built using a hybrid approach combining Large Language Models and expert linguists, it offers precise definitions with special attention to multi-word expressions and domain-specific terminology. The system provides comprehensive coverage of technical domains relevant to professional translators while maintaining daily updates to address emerging terminology needs. It also provides indicative translations in 26 languages linked to each meaning, and variants within languages, when appropriate, and has links to Reverso Context, the range of contextual and corpus-based bilingual dictionaries, and Reverso Synonyms. We will show the various ways to use it with concrete examples and give some insights on its design and creation process.

## introduction professional translators and post-editors working with machine translation (mt) systems or llms face significant challenges in determining precise contextual meanings, particularly for domainspecific terms and multiword expressions. traditional dictionaries often fall short due to limited coverage, complex definitions, and poor handling of expressions that are typically buried within word entries. domain-specific terminology frequently lacks clear field indicators in conventional resources, forcing professionals to consult multiple specialized sources, company-specific term databases, and ultimately rely on search engines without editorial guidance. reverso define tackles these limitations through an ai-driven approach that reimagines dictionary organization. the system elevates multi-word expressions to standalone entries, provides clear, noncircular definitions optimized for non-native english speakers, and integrates domain indicators for technical terminology. this design directly addresses the needs of translation professionals who require quick access to precise, contextual meanings to maintain efficient workflows. ## availability and future development reverso define is available across web, mobile, and desktop platforms. the web version is free to use, while desktop and browser extensions follow a freemium model with basic features available at no cost and advanced features requiring subscription. enterprise licensing options are available for cat tool integration, with pricing based on user volume and integration requirements. a public api for direct cat tool integration is currently in development. the system provides definitions in english with indicative translations in 26 languages, including french (france/canada), spanish, catalan, italian, portuguese (european/brazilian), romanian, german, danish, dutch, swedish, yiddish, russian, ukrainian, polish, greek, arabic, hebrew, bengali, persian, hindi, japanese, korean, thai, turkish, vietnamese and chinese. future development plans focus on an even larger coverage of specialty domains and less common idioms, more languages supported for definitions, and a constant review of accuracy of definitions, examples, and translations. ## conclusion reverso define represents a significant advance in dictionary technology for translation professionals, combining ai capabilities with linguistic expertise to provide precise and contextual definitions. its focus on expression-level entries and domainspecific terminology, coupled with seamless workflow integration, makes it a valuable companion tool for professional translation workflows. continuous updates of the system ensure that it remains a current resource for the translation community. https://dictionary.reverso.net