Reading Theme:
Valid: Definition, Usage & Key Distinctions (2 meaning)
Meaning 1：logically sound (valid)
valid
/ˈvælɪd/
adj.
Sound and based on good reasoning or evidence; it makes sense and can be accepted as true or reasonable.
logically sound
➕
/ˈlɒdʒɪkli saʊnd/
adj.
Describes an idea or argument that is based on good reasoning or solid evidence, making it acceptable and convincing.
📘 Details & Usage
📖 Root Explanation
From Latin 'validus' meaning strong, related to 'valere' to be strong.
💡 Mnemonic
Think 'valid' as 'value added' – it adds strength and acceptability.
📖 Example
During the school debate, her point about recycling was very valid because she showed clear data on how it reduces pollution.
In the school debate, her argument was well-supported by clear data, making it logically sound and acceptable.
🔗 Collocations
valid argument – an argument that is logically sound and well-reasoned
valid point – a point that is based on good evidence or reasoning
valid reason – a reason that is justifiable and reasonable
🔄 Synonyms
sound (adj.) – based on valid reasoning or evidence
logical (adj.) – following a clear, rational thought process
reasonable (adj.) – fair and sensible, based on good sense
🚫 Antonyms
invalid (adj.) – not based on truth or reason, not acceptable
illogical (adj.) – not following logical reasoning
unreasonable (adj.) – not fair or sensible
🌱 Derivatives
validity (n.) – the quality of being logically or legally sound
validate (v.) – to check or prove the validity of something
validation (n.) – the action of validating or the state of being validated
📖 Cultural Story
Derived from Latin 'validus' (strong, powerful), entering English in the late 16th century to denote strength in argument or legal force.
Meaning 2：legally binding (valid)
valid
/ˈvælɪd/
adj.
Legally acceptable and officially approved; a document, ticket, or agreement that can be used because it follows the rules or laws.
legally binding
➕
/ˈliːɡəli ˈbaɪndɪŋ/
adj.
Refers to a document, agreement, or action that is officially approved and conforms to the law, making it enforceable and acceptable.
📘 Details & Usage
📖 Example
Please check the expiration date to ensure your train ticket is still valid before boarding.
Make sure to verify the expiry date to confirm that your train ticket is legally binding and usable for travel.
🔗 Collocations
valid passport – a passport that is legally acceptable and not expired
valid contract – a contract that is officially approved and enforceable by law
valid license – a license that is currently in effect and compliant with regulations
🔄 Synonyms
🚫 Antonyms
🌱 Derivatives
validity (n.) – the state of being legally or officially acceptable
validate (v.) – to make legally valid or to confirm officially
validation (n.) – the process of making something valid
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