density - Master This Word
Master this word with our 5-step learning method – Learn English in English
density Word Meanings
- the mass of a substance per unit volume
- the degree of compactness of a substance
- a measure of how much matter is in a given space
density Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
density Phonetic & Pronunciation
UK
/ˈdɛnsɪti/
US
/ˈdɛnʃɪti/
density Word Etymology
den- = 'to build' + -sity = 'quality of' (quality of compactness); from Latin 'densitas' → Old French 'densité' → English; Imagine a pile of bricks tightly packed together, symbolizing the quality of density.
Note 1: These definitions and etymologies are not standard dictionary definitions, but extended explanations provided to help with memorization and understanding of the actual application of words. Through this background information, we strive to make words more vivid and easier to understand, and help you remember their meanings in real life.
Note 2: LexiTalk designs the learning flow around the linguistics principle of “Comprehensible Input.” When learners encounter material that is slightly above their level but still understandable from context, the brain naturally absorbs the language. That’s why we keep every word inside authentic contexts, using examples and associations to help you understand it and use it flexibly.
Read the FAQ explanation of Comprehensible InputEnglish Brain Route
I hold a small block in my palm and push, watching it move under my effort. I shift my grip, press a bit harder, then ease off and feel how the block holds its shape. I keep adjusting my touch, counting how the resistance changes as I change the pressure. In that moment, density feels like the weight of space packed with matter, decided by how I press, hold, and release.
Real Context
Density is a property that describes how heavy something is for its size. In science, it usually means mass per unit volume, such as kilograms per cubic meter. A substance with high density has a lot of matter packed into a small space, while a low density material feels light for its volume. People also talk about density in a more abstract sense, like the density of data in a map or rainfall density in a region. Understanding density helps compare materials, predict behavior under pressure, and calculate buoyancy, porosity, and material performance. Remember that density is independent of gravity in most standard contexts, determined by mass and volume.
Usage Reminders
- Know the core formula: density = mass / volume. Use the correct units (kg/m^3 or g/cm^3). Distinguish density from weight and from concentration. Remember density can change with temperature and pressure. Use 'high density' and 'low density' for materials, and 'dense' as an adjective for packed objects. Avoid confusing density with thickness or crowding.
Common Misconceptions
- Density equals weight.
- Density depends on gravity.
- Dense means heavy in all senses; density and thickness are the same.
- Density is the same as concentration.
- A substance has the same density everywhere.
Thinking Differences
In English, density is treated as an intrinsic physical property defined by mass per volume, with a clear distinction from weight, thickness, and crowding in everyday usage.
Learning Tips
- Memorize the standard formula D = m / V
- Practice with water, metals, and air to feel density differences
- Learn common collocations: high density, low density, dense material
- Distinguish density from mass, weight, and concentration
- Note how temperature and pressure can change density
- Use unit checks to avoid converting errors
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the meaning of the word 'density'?
A.The color of an object
B.The degree of compactness of a substance
C.The thickness of a liquid
D.The taste of a food
Step 2: Usage
Which sentence uses the word 'density' correctly?
A.The density of the water in the lake is lower than the density of the air surrounding it.
B.The density of the sky is very blue today.
C.The density of the table increased when a book was placed on top of it.
D.The density of the sun is brighter than the density of the moon.
Step 3: Similar Words
Which word is most similar to 'density'?
A.Hardness
B.Brightness
C.Thickness
D.Loudness
Step 4: Opposite Words
What is the opposite of 'density'?
A.Lightness
B.Clarity
C.Transparency
D.Solidity
Step 5: Mastery
Can you think of a real-life scenario of 'density'?
A.Buying a density measurement device online.
B.Comparing the density of different types of rocks in a geology lab.
C.Solving a density-related math problem in a physics class.
D.Density bar charts showing population density in different countries.
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