law of definite proportions
n · noun
Simple meaning
Law stating that every pure substance always contains the same elements combined in the same proportions by weight.
Pronunciation
Say it like this:
lawuhvdehfuhnuhtpruhpawrshuhnzSay the bold part a little louder.
IPA pronunciation (US)
ˈlɔˈʌvˈdɛfənətpɹəˈpɔɹʃənz
This word is pronounced essentially the same in American and British English, so one transcription covers both.
IPA (International Phonetic Alphabet) is a standard way of writing speech sounds.
Definition
Everyday modern meanings first, grouped by part of speech.
n
In chemistry, the law of definite proportions, sometimes called Proust's law or the law of constant composition, states that a given
noun
chemistry
Law stating that every pure substance always contains the same elements combined in the same proportions by weight
Word Aura™
How this word commonly comes across.
Aura for this meaning
This meaning: In chemistry, the law of definite proportions, sometimes called Proust's law or the law of constant composition, states that a given
Used this way, law of definite proportions is a specialist word that usually carries little praise or criticism of its own. This is a legal use: the wording is institutional and carries a defined meaning in law rather than a loose everyday one.
- Emotional tone
- Neutral
- Formality
- Specialist/technical
- Intensity
- Not strongly marked
- How common
- Specialized
- Connotation
- Clinical and technical
- Usage feel
- Technical and specialized
Where it naturally appears
- Law/legal
- Government/politics
- Academic writing
- Science
Usage note
In general conversation this sense usually needs explaining — outside its field, people reach for a plainer word.
Word Aura describes common impressions, not a measurement. Tone changes with sentence, speaker, relationship and situation.
Share your sentence
Ask Vocabaura
Understand the word your way.
What Does It Mean Here?
Words can change meaning depending on context.
Use it yourself
Knowing “law of definite proportions” starts when you use it. Pick a next step, all free.
- Use it in a sentenceWrite your own line with “law of definite proportions” and get instant feedback.
- Practice it in contextShort real-world questions, free, no credits.
- Review it laterSpaced review keeps the word from slipping away.
- Type itType “law of definite proportions” from its meaning to lock in the spelling.
Dictionary data from Wiktionary via the Free Dictionary API. Simple meanings, combinations and word intelligence are built from verified reference data, no AI is used to load this page.