Since 2013, Google has evolved from a lexical engine (matching exact words) to a semantic search engine that understands intent and context.
A quality article should provide a complete or comprehensive description of the topic, going "beyond the obvious". google definition
For technical terms or idioms, using Google Image Search often provides a visual "definition" that text cannot easily capture. 2. How Google Defines "Quality Content" (E-E-A-T) Since 2013, Google has evolved from a lexical
Google defines high-quality work as content created to help people , rather than content created primarily to rank in search engines. google definition
In the world of Google Ads, "definition" takes on a technical role regarding keyword match types . How to Determine Content Quality and Write Accordingly