What does expertise mean?
Expertise refers to a high level of skill, knowledge, or competence in a particular field — the kind of mastery that comes from sustained training, study, and hands-on practice. It is an uncountable noun, so one speaks of having, gaining, or demonstrating expertise rather than acquiring individual pieces of it. The word carries strongly positive connotations: to have expertise is to be trusted, sought out, and respected in one's domain, whether that domain is law, medicine, engineering, or a craft such as winemaking. Common phrases include 'technical expertise', 'expertise in' a subject, and 'area of expertise'. Derived from the Latin 'expertus', meaning 'tried' or 'tested', the word entered English via French and shares its roots with 'expert' and 'experience'. In modern usage, expertise often signals authority — organizations rely on external expertise precisely because it represents tested judgment rather than mere opinion.
nounExpert skill or knowledge in a particular field, acquired through training and experience.
- Specialized skill or expert knowledge in a particular field, especially as demonstrated through professional practice.
"Her expertise in medieval manuscripts made her the obvious choice to catalogue the collection."
"The firm hired a consultant whose expertise in cybersecurity proved invaluable during the breach."
"With decades of expertise behind him, the winemaker could judge a harvest by scent alone."
Rarely used; 'expertise' is normally uncountable. The plural appears occasionally in formal contexts referring to multiple distinct areas or instances of specialist knowledge.
"The panel brought together the expertises of surgeons, ethicists, and lawyers."
You can't see or touch it, but 'expertise' literally means what has been 'tried out' by experience — the word comes straight from Latin for something put to the test.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of expertise
The word derives ultimately from Latin 'expertus', the past participle of 'experiri', meaning 'to try' or 'to test'. It passed into English in the early 17th century via French 'expertise', which denoted the assessment or opinion of a specialist. Its cognates in English include 'expert' and, more distantly, 'experience', all stemming from the same Latin root about trial and testing.
How expertise is actually used
Formal to neutral in register; common in professional, academic, and journalistic contexts. It functions as an uncountable noun — you generally speak of 'a great deal of expertise' rather than 'expertises'. The plural form exists but is rare and typically appears only when referring to distinct kinds of expertise held by different people or bodies.
Easily confused with expertise
Experience is the accumulated knowledge gained from doing something over time, whereas expertise is a high level of skill or mastery resulting largely from that experience.