red flag

red flag
A cue, warning, or alert; a sign or signal that something is wrong.

Improper formatting is a red flag to look for other problems with the data.


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  • Red flag — Red flags can signify a warning, martial law, defiance, or left wing politics. The earliest citation for red flag in the Oxford English Dictionary is from 1602 and shows that at that time the flag was used by military forces to indicate that they …   Wikipedia

  • Red Flag — Alaska is a realistic, 10 day air combat United States Air Force training exercise held up to four times a year. It is held at Eielson Air Force Base and Elmendorf Air Force Base in the State of Alaska. Each RED FLAG Alaska exercise is a multi… …   Wikipedia

  • Red flag — Red Red, a. [Compar. {Redder} ( d?r); superl. {Reddest}.] [OE. red, reed, AS. re[ a]d, re[ o]d; akin to OS. r[=o]d, OFries. r[=a]d, D. rood, G. roht, rot, OHG. r[=o]t, Dan. & Sw. r[ o]d, Icel. rau[eth]r, rj[=o][eth]r, Goth. r[ a]uds, W. rhudd,… …   The Collaborative International Dictionary of English

  • red flag — red flags 1) N COUNT A red flag is a flag that is red in colour and is used as a symbol to represent communism and socialism or to indicate danger or as a sign that you should stop. They waved red flags and shouted, Lenin, yes ... Then the rain… …   English dictionary

  • Red flag — Flag Flag, n. [Cf. LG. & G. flagge, Sw. flagg, Dan. flag, D. vlag. See {Flag} to hang loose.] 1. That which flags or hangs down loosely. [1913 Webster] 2. A cloth usually bearing a device or devices and used to indicate nationality, party, etc.,… …   The Collaborative International Dictionary of English

  • red-flag — /red flag /, v., red flagged, red flagging, adj. v.t. 1. to mark or draw attention to for a particular purpose: The department has red flagged the most urgent repair work to be done. 2. to provoke the attention of; alert; arouse: The animal s… …   Universalium

  • red-flag — /red flag /, v., red flagged, red flagging, adj. v.t. 1. to mark or draw attention to for a particular purpose: The department has red flagged the most urgent repair work to be done. 2. to provoke the attention of; alert; arouse: The animal s… …   Useful english dictionary

  • red flag — noun count 1. ) a red flag used as a signal of danger or telling you to stop 2. ) a red flag used as a sign of SOCIALISM …   Usage of the words and phrases in modern English

  • red-flag — [red′flag′] vt. red flagged, red flagging to mark, designate, or otherwise call attention to as being risky, unsuitable, etc …   English World dictionary

  • red flag — red′ flag′ n. 1) cvb a warning flag 2) cvb a danger signal 3) cvb something that provokes an angry or hostile reaction: The talk about raising taxes was a red flag to many voters[/ex] • Etymology: 1770–80 …   From formal English to slang

  • red flag — n. 1. a warning flag 2. Informal something serving as a warning of trouble or danger ahead 3. Informal something that arouses anger, irritation, revolt, etc …   English World dictionary

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