theoretical

/ˌθɪəˈretɪkl/ (bre, ipa) · /ˌθiːəˈretɪkl/ (ame, ipa) · /ˌthē-ə-ˈre-ti-kəl ˌthir-ˈe-ti-kəl/ (ame, mw)

theoretical — adjective

  • theoreticalpositive
  • more theoreticalcomparative
  • most theoreticalsuperlative

1. relating to a system of ideas that forms the basis of a subject, as opposed to i

1.形容詞B2
釋義

relating to a system of ideas that forms the basis of a subject, as opposed to its practical use or application

例句

The course covers the theoretical foundations of linguistics, not classroom teaching methods.

collocation: theoretical foundations

Emily found the theoretical part of the physics exam harder than the practical problems.

同義詞
  • abstract

    broader term; theoretical is a type of abstract knowledge connected to a formal system of ideas

  • conceptual

    focuses on the concepts involved rather than formal principles

  • academic

    sometimes overlaps with theoretical, but can also mean 'of little practical relevance'

反義詞
  • practical

    directly concerned with actual use or application

  • applied

    used in real-world contexts rather than studied as principles

  • empirical

    based on observation or experiment rather than theory

文法句型

theoretical + noun (framework, model, approach)

be theoretical

用法筆記

Often used before nouns such as framework, model, approach, foundation, or understanding, especially in academic writing. Commonly contrasted with practical or applied.

常見錯誤

❌She took a theoretical approach to fixing the broken tap by watching online tutorials.
✅She took a practical approach to fixing the broken tap by watching online tutorials.
💡Watching tutorials and fixing things is hands-on, not about abstract principles.
❌I enrolled in a theoretical driving course where we actually drove on the roads.
✅I enrolled in a practical driving course where we actually drove on the roads.
💡If you are doing hands-on activities, use practical, not theoretical.

2. concerned with something that is only believed or guessed to be true, not yet sh

2.形容詞B2
釋義

concerned with something that is only believed or guessed to be true, not yet shown to be real

例句

The existence of dark matter is still theoretical, as no one has directly detected it.

remain + theoretical (stative, unproven status)

Sofia presented a theoretical model of how the disease might spread through the city.

theoretical model + of + noun phrase

同義詞
  • hypothetical

    the closest synonym; both describe unproven ideas, but hypothetical often implies a question or thought experiment

  • speculative

    suggests more guesswork and less formal reasoning than theoretical

  • conjectural

    formal; based on guesswork rather than solid facts

反義詞
  • proven

    shown to be true through evidence

  • confirmed

    established as true by verification

  • verified

    checked and found to be accurate

文法句型

be + theoretical

theoretical + noun (risk, possibility, model)

purely / largely / merely theoretical

用法筆記

Frequently used with adverbs only, purely, or merely to stress the lack of evidence. Distinguish from sense 1: sense 1 describes principles that are known and accepted but not directly applied; sense 2 describes ideas that have not been confirmed as true.

常見錯誤

❌There is a theoretical chance of rain tomorrow, about 80%.
✅There is a high chance of rain tomorrow, about 80%.
💡Theoretical does not mean 'possible' or 'likely'; it means unproven or based on speculation rather than evidence.