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TOEFL BNC: 3211 COCA: 4703

valid

Word family 
Related topics: Computers
val·id /ˈvælɪd/ ●●○ AWL adjectiveadj  
1  USE somethinga valid ticket, document, or agreement is legally or officially acceptable 有效的；正式认可的 OPP invalid
 a valid credit card
有效信用卡
 Your return ticket is valid for three months.
你的往返票有效期为三个月。
2  valid reason/argument/criticism etc RIGHT/JUSTIFIEDa reason, argument etc that is based on what is reasonable or sensible 合理[正当]的理由/论点/批评等
 Police officers must have a valid reason for stopping motorists.
警察拦下驾车者必须有正当理由。
Examples from the Corpus
valid reason/argument/criticism etc• But neither do we have to be defensive if they occasionally have a valid criticism.• But a complete justification of authority has to do more than to provide valid reasons for its acceptance.• But there are also valid reasons for optimism.• Povert drudgery and loneliness are valid reasons for sadness; beyond and beneath, far outreaching them all, is unrequited love.• Accepting criticism Accepting valid criticism is also part of this group of assertive actions.• A second and equally valid argument is that the publishing world is an invaluable source of knowledge.• No serious thinker can make a valid argument that to discriminate based on species is acceptable.• A 1977 Supreme Court ruling permits police stopping a car for valid reasons to order drivers to exit.
3. a valid password, ID etc is one that will be accepted by a computer system 〔密码、账号等〕系统认可的，有效的 OPP invalid
—validity /vəˈlɪdəti/ noun [uncountableU]
 I would question the validity of that statement.
我质疑那种说法的正确性。
n COLLOCATIONS – Meaning 2:
nouns
point
I think that's a valid point.
reason
I had a perfectly valid reason for being there.
argument
None of these arguments are valid.
criticism
If the criticism is valid, you should make the appropriate changes.
excuse
You must have a valid excuse for any absence.
adverbs
equally valid
Each of these ways of looking at things is equally valid.
perfectly valid
It's a perfectly valid question.
statistically/scientifically valid (=based on correct numbers or good research)
The drug trials were scientifically valid.
Examples from the Corpus
valid• He says they can even zoom in on tax discs to see if they're valid.• It is obvious that students should not believe that their own ideas by themselves are valid.• Oh, so you say the translation is not valid.• All of those criticisms are valid.• The government still hasn't produced a valid argument in favour of its policies on immigration.• But at this point, no valid comparison can be made between their clocks, for they are separated.• They had some valid concerns about the safety of the airplane.• This may not be a valid conclusion - we haven't tested it thoroughly yet.• a valid driver's license• My passport is valid for 10 years.• Both certificates are valid for three months and the ceremony must take place in the district where notice has been given.• The tourist visa is valid for three months.• Your ticket is valid for travel at any time of the day.• Please supply a valid name and password.• Incorrect or invalid names are mentioned following the valid ones.• Many of Rousseau's ideas are just as valid today as they were in the 18th century.
From Longman Business Dictionary
validval·id /ˈvælɪd/ adjectiveadjLAW
a valid document or agreement is legally acceptable, often for a fixed period of time
The court ruled that the firm’s patent is valid and enforceable.
Investors with valid claims against the company could receive payments within a few months.
The voucher is valid for 12 months.
Origin valid
(1500-1600) French valide, from Latin validus “strong, effective”, from valere; → VALOR
val·id adjectiveadj →n COLLOCATIONS1
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