theoretically.
in theory; on paper
Meaning & usage
in theory; on paper
I haven't tested it, but theoretically it ought to fly.
in a theoretical manner
I solved the problem theoretically rather than practically.
in theory though not necessarily in reality.
Where this word comes from
Etymology tree English theoretical Proto-Indo-European *leyg-der. Proto-Germanic *līkąder. Proto-Germanic *-līkaz Proto-Germanic *-ê Proto-Germanic *-līkê Proto-West Germanic *-līkē Old English -līċe Middle English -ly English -ly English theoretically From theoretical + -ly.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.