Defining and Explaining in Thai

Overview

Defining and explaining structures let you describe what things are, what words mean, and how concepts work. This is particularly useful at the CEFR B1 (intermediate) level for classroom interaction, giving presentations, and navigating situations where you need to explain or ask about unfamiliar terms.

The key structures are: X คืออะไร (what is X?), หมายความว่า (it means that), คือ [khʉʉ] (that is / namely), and เรียกว่า (called / known as). คือ is especially versatile -- it can introduce a definition, an explanation, or a restatement.

These structures appear frequently in educational contexts, dictionary definitions, news explanations, and everyday situations where clarification is needed. อันนี้เรียกว่าตุ๊กตุ๊ก (this is called a tuk-tuk) might be something you hear when a Thai friend explains local transport. ต้มยำคืออะไร (what is tom yam?) is a natural question at a restaurant.

How It Works

Key Patterns

• Structures for defining: X คืออะไร (what is X), หมายความว่า (means), คือ (that is), เรียกว่า (called)
• Used in academic and explanatory contexts.

Pattern Examples

Thai	English	Pattern
ต้มยำคืออะไร	What is tom yam?	Core pattern
หมายความว่าคุณเห็นด้วย	It means you agree.	Core pattern
คือต้องทำใหม่	That is, we have to redo it.	Core pattern
อันนี้เรียกว่าตุ๊กตุ๊ก	This is called a tuk-tuk.	Core pattern

How to Form Sentences

At this level, defining and explaining patterns begin to combine with other grammatical structures you have already learned. You can nest these constructions within larger sentences, combine them with tense markers, and use them alongside conditional or comparative structures.

The flexibility of Thai grammar means these patterns can often be rearranged for emphasis or stylistic effect. In formal writing, certain word orders are preferred, while casual speech allows more variation. Pay attention to how native speakers deploy these structures in different contexts.

Tip: When reading Thai texts at this level, identify instances of these patterns and note the surrounding context. This helps you understand not just the grammar but also when and why Thai speakers choose particular constructions.

Examples in Context

Thai	English	Note
ต้มยำคืออะไร	What is tom yam?
หมายความว่าคุณเห็นด้วย	It means you agree.
คือต้องทำใหม่	That is, we have to redo it.
อันนี้เรียกว่าตุ๊กตุ๊ก	This is called a tuk-tuk.
ต้มยำคืออะไร	What is tom yam?	Common usage
หมายความว่าคุณเห็นด้วย	It means you agree.	Everyday context
คือต้องทำใหม่	That is, we have to redo it.	Practice this pattern
อันนี้เรียกว่าตุ๊กตุ๊ก	This is called a tuk-tuk.	Frequently heard

Common Mistakes

Applying English grammar patterns to Thai

• Wrong: Directly translating English sentence structure for defining and explaining
• Right: Follow the Thai word order as shown in the examples above
• Why: Thai has its own structural logic. Word order, particles, and context work differently than in English.

Omitting required elements

• Wrong: Leaving out key markers or particles when forming defining and explaining patterns
• Right: Include all the structural elements shown in the formation rules
• Why: While Thai is flexible in many ways, certain structural elements are required for the sentence to sound natural and be understood correctly.

Using the wrong register

• Wrong: Using casual forms in formal settings or vice versa
• Right: Match the formality level to the context
• Why: Thai has strong register distinctions. Using overly casual language in formal situations or overly formal language with friends can create awkward impressions.

Usage Notes

In formal spoken and written Thai, defining and explaining patterns may appear with additional polite language, formal vocabulary, or adjusted word order. News broadcasts, academic texts, and official documents often prefer more elaborate versions of these structures, while casual conversation uses streamlined alternatives.

Regional variations exist across Thailand. Central Thai (the standard) is what is taught here, but speakers from the Northeast (Isan), North (Lanna), and South may use slightly different forms or vocabulary for the same grammatical function. As you encounter Thai speakers from different regions, you may notice these variations.

Register awareness is important at this level. The same grammatical concept might be expressed differently in a text message to a friend versus a business email versus a news article. Practice recognizing and producing defining and explaining patterns across multiple registers to build versatility.

Practice Tips

1. Read Thai content at your level. Simple news articles, graded readers, and Thai social media posts provide natural examples of defining and explaining in context.
2. Practice transforming sentences. Take simple sentences and add complexity using defining and explaining patterns. This builds your ability to express more nuanced ideas.
3. Record yourself and compare. Record yourself using these patterns and compare with native speaker recordings to refine your usage.

Related Concepts

• เป็น (to be)