What does deem mean?
"Deem" is a formal verb meaning to judge, consider, or officially regard something as having a particular quality or status. When you deem something suitable, dangerous, or necessary, you are making a considered assessment about it — and because the word carries an air of authority, it appears frequently in legal documents, regulations, committee reports, and other official contexts. Grammatically, "deem" usually takes an object followed by an adjective, noun, or infinitive: "the court deemed the evidence admissible," or "she was deemed unfit for duty." In legal usage, "deemed" has a precise technical force — if something "is deemed to be" the case, the law treats it as true whether or not it actually is. The word descends from Old English "dēman," meaning to judge or pronounce sentence, making it a close relative of "doom." It is useful whenever neutral description feels insufficient and an explicit act of judgment is meant.
To consider, judge, or officially regard something as having a specified quality or status.
"The referee deemed the goal invalid because of an earlier foul."
Almost always used transitively with an object plus adjective, noun, or infinitive complement; rarely used without such a complement in careful writing.
To treat a thing as being legally the case, regardless of actual fact.
"Notice is deemed given once the letter is posted."
A technical term of art in statutes and contracts; "deemed" here creates a legal fiction.
Before "deem" meant to judge anything else, it meant to pronounce a doom — it comes from the same Old English root as the word "doom" itself.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of deem
"Deem" derives from the Old English verb "dēman," meaning to judge, decide, or pronounce sentence, which itself goes back to the Proto-Germanic root *dōmjan-, related to *dōmaz (judgment). This makes it a sibling of the modern word "doom," which originally referred simply to a judgment or verdict before narrowing to its sense of catastrophic fate. The same Germanic root underlies words borrowed later from Latin via Greek, such as "democracy" (rule by the people's judgment) from Greek "dēmos"-related formations sharing the Indo-European base. Cognates appear in other Germanic languages, including Old High German "tuomen" and Gothic "dōmjan."
How deem is actually used
"Deem" is notably formal and is especially common in legal, administrative, and official writing. It typically takes an object followed by an adjective, noun, or infinitive complement (e.g., "deem it necessary," "deem the results valid") rather than appearing with simple direct objects alone.
Easily confused with deem
"Seem" describes how something appears (often passively perceived), while "deem" describes an active judgment or official decision that something is a certain way.