flag

• 名词，指一块布料或类似材料，通常带有独特的图案，用作国家、组织等的象征，或用作信号。

A noun referring to a piece of cloth or similar material, typically with a distinctive design, used as a symbol of a country, organization, or as a signal.

1. Symbolic clothA1formal

   A piece of cloth with a distinctive design, used as a symbol of a country, organization, or cause.

   旗帜

   • The national flag was raised during the ceremony.
   • They waved flags to celebrate the victory.
   • Each country has its own unique flag.

   同义词bannerensignpennantpennonstandardstreamer

2. Signal or markerA2formal

   A device or object used to attract attention or convey information, often in sports or signaling.

   信号旗

   • The referee raised a flag to indicate a foul.
   • The hikers used a red flag to mark the trail.
   • A yellow flag was shown to warn drivers of danger.

   同义词beaconindicatormarkerpennantsignal

3. Indicator of statusB1informal

   A sign or indicator that something is present or needs attention.

   标志

   • The red flag on the report means it needs review.
   • His unusual behavior was a red flag for the team.
   • The system raises a flag when an error occurs.

   同义词alarmbeaconcueindicatormarkersignsignaltoken

• 动词，用于表示标记某物以引起注意、发出信号，或表示变得虚弱/疲倦。

A verb used to indicate the act of marking something for attention, signaling, or becoming weak or tired.

1. Mark or indicateB1formal

   To mark something for attention or to indicate its importance.

   标记

   • The teacher flagged the most important pages in the textbook.
   • Please flag any errors in the report.
   • The system flagged the suspicious transaction for review.

   同义词designatehighlightidentifyindicatelabelmarknotepoint outsingle outtag

2. Become weak or tiredB2formal

   To lose strength, energy, or enthusiasm.

   衰弱

   • His energy began to flag after the long hike.
   • Interest in the project flagged as time went on.
   • The conversation flagged when they ran out of topics.

   同义词declinedroopdwindlefadefaillanguishsagtirewaneweaken

   反义词rallyrecoverrevivestrengthen

3. Signal or communicateB1formal

   To use a flag or similar signal to communicate a message.

   示意

   • The ship flagged its distress with a red signal.
   • The referee flagged the player for a foul.
   • They flagged down a taxi on the street corner.

   同义词beaconindicatesemaphoresignalwave

短语动词变体flag down