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tr. & intr.v. straight·ened, straight·en·ing, straight·ens
To make or become straight or straighter.
Phrasal Verb:
straighten out
1. To resolve (a confusion or conflict).
2. To make less confused or troubled: tried to straighten out the problem student.

straight′en·er n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.straightener - a device for straightening; "a hair straightener"
device - an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Straight Off, Straight Away is a campaign that RoSPA and NHSGGC are involved in to raise awareness of hair straightener burns to children.
The 16-year-old died from "catastrophic bleeding" after he wasstabbed in the leg during a "straightener" with another teen in Gateacre.
Theghd IV Styleris a premium straightener boasting a number of big features, such as ceramic heater technology, sleep mode, universal voltage and more.
The four-product Kiss Gold Edition line comes in metallic, matte gold and rose gold colors and includes the KissTourmaline Gold hair dryer, Kiss Comb Straightener appliance, and the Kiss Ionic Smoothing and Kiss Bristle Straightener brushes.
The expert view: Steve says: "Conceptually this is a great idea, but I don't think it's an amazing straightener. If you only have room for one tool in your life, or you travel a lot and want to be able to change up your style it's probably worth it, but I'd rather have a better straightening iron."
SCARRED FOR LIFE THE most common location for a serious hair straightener burn is on the hand, but injuries have also been sustained to the head, arm and foot.
Next day, Cully suggested a "straightener" - a fist fight - between Darren and the man who bit his ear.
New York, NY, May 20, 2015 --( Solona Products[R] introduces Salona Professional 1" Titanium Flat Iron Hair Straightener for use in beauty salons and for women on the go.
As part of its campaign, the Council has issued a brand new flyer on hair straightener safety, which can be given out to parents.
Helen of Troy debuted the Revlon Titanium, a curler and straightener with titanium plates for even heat distribution and a smooth glide.
Braun's Satin Hair Colour Straightener is designed specifically for women with coloured hair, allowing them to maintain the vibrancy of their hair by reducing colour fade by up to 70%.