classified

• 指信息被官方列为机密、仅限授权人员知悉的；也可指被归入某一类别的事物。

Describes information that is officially secret and accessible only to authorized personnel.

1. Secret or confidentialB2formal

   Officially designated as secret and not accessible to the public.

   机密的

   • The documents were marked as classified.
   • He was cleared to access classified information.
   • The government declassified some files after 50 years.

   同义词closedconfidentialhush-hushnonpublicprivilegedrestrictedsecretsensitivetop-secretunder wraps

   反义词declassifiedopenpublicunclassified

2. Categorized or groupedB1formal

   Arranged or organized into categories or classes.

   分类的

   • The library has a classified catalog of books.
   • The data is classified by age and gender.
   • All items are classified according to their type.

   同义词arrangedcategorizedgroupedorganizedsorted

   反义词uncategorizedunclassified

• 名词，指被官方列为机密或保密的信息或文件，通常出于国家安全或隐私方面的考虑。

A noun referring to information or documents that are officially designated as secret or confidential, typically for reasons of national security or privacy.

1. Classified advertisementsB1formal

   Small advertisements placed in newspapers or online, typically grouped by category.

   分类广告

   • She found a used car in the classifieds.
   • He placed a classified ad for his apartment rental.
   • The newspaper's classified section lists job openings and services.

   同义词classified adwant ad

• 动词，指按照共同特征将事物归入不同类别或组别，即对事物进行归类、分级或排序。

A verb used to indicate the act of arranging or categorizing something into groups or classes based on shared characteristics.

1. Arrange in categoriesB1formal

   To arrange or organize things into groups based on shared characteristics.

   分类

   • Librarians classify books by genre and author.
   • Scientists classify animals into different species.
   • The data was classified according to age and income.

   同义词categorizefilegradegrouporderorganizepigeonholeranksort

   反义词disorder

2. Mark as secretB2formal

   To officially designate information as secret or restricted.

   列为机密

   • The government classified the documents for national security.
   • Military operations are often classified to protect sensitive details.
   • The report was classified as top secret.

   反义词declassifydisclosereveal