theoretical

adjective

the·​o·​ret·​i·​cal ˌthē-ə-ˈre-ti-kəl How to pronounce theoretical (audio)
ˌthir-ˈe-ti-kəl
variants or less commonly theoretic
Synonyms of theoretical
1
: existing only in theory : hypothetical
gave as an example a theoretical situation
2
a
: relating to or having the character of theory : abstract
b
: confined to theory or speculation often in contrast to practical applications : speculative
theoretical physics
3
: given to or skilled in theorizing
a brilliant theoretical physicist

Examples of theoretical in a Sentence

On a theoretical level, hiring more people seems logical. The idea is purely theoretical at this point. The danger is more than just a theoretical possibility.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The researchers then used theoretical analysis to identify these features as topological edge states. — Aamir Khollam, Interesting Engineering, 23 Oct. 2026 Drawing on the theoretical work of economist Hyman Minsky, Kindleberger went through centuries of economic history and saw a recurring pattern. — Greg Rosalsky, NPR, 20 Oct. 2026 There are scores of results across not just number theory but also geometry and theoretical computer science that the proofs of quasi-Riemann will, in a swift stroke, establish as mathematical truths. — Quanta Magazine, 19 Oct. 2026 Michael Flynn was 28 and working towards earning his PHD in theoretical physics when the 30-foot-long dead tree limb fell over 27 feet onto him, fracturing his skull and changing his life forever. — Madisen Keavy, CBS News, 16 Oct. 2026 See All Example Sentences for theoretical

Word History

Etymology

Late Latin theoreticus, from Greek theōrētikos, from theōrein to look at

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of theoretical was in the 15th century

Browse Nearby Words

Cite this Entry

“Theoretical.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/theoretical. Accessed 27 Oct. 2026.

Kids Definition

theoretical

adjective
the·​o·​ret·​i·​cal ˌthē-ə-ˈret-i-kəl How to pronounce theoretical (audio)
ˌthi(-ə)r-ˈet-
1
a
: relating to or having the character of theory : abstract
b
: limited to theory or speculation : speculative
theoretical physics
2
: existing only in theory : hypothetical
a theoretical situation
theoretically
-i-k(ə-)lē
adverb
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