English Reference
noun · verb · adjective

flank

n. · v. · adj.
US /ˈfɫæŋk/ UK /flˈæŋk/ flank UK spelling flanking, flanks

  1. 01 B2 Upper Intermediate Medicine

    n.the side of a person's or animal's body between the ribs and the hip.

    n.the lateral part of the body between the last rib and the hip.

    Simple

    The horse had a small white patch on its left flank.

    In context

    The patient complained of a sharp, localized pain in her right flank, suggesting a potential issue with the kidney.

    sidehaunch
  2. 02 C1 Advanced Formal Sport

    n.the right or left side of a group of soldiers or a sports team.

    n.the extreme left or right edge of a military formation, army, or sports field.

    Simple

    The fast runner moved down the left flank to cross the ball into the box.

    In context

    The general ordered a surprise attack on the enemy's weakened eastern flank to break their defensive line.

  3. 03 B2 Upper Intermediate Cooking

    n.a cut of beef from the side of the cow, often used for grilling.

    n.a specific cut of meat from the abdominal muscles of an animal, typically lean and fibrous.

    Simple

    We marinated the flank steak for three hours before putting it on the grill.

    In context

    Because flank is a relatively tough cut of meat, it should be sliced thinly against the grain to ensure tenderness.

    flank steak
  4. 04 B2 Upper Intermediate

    v.to be positioned on one or both sides of something or someone.

    v.to be situated at the side of; in the passive, to be bordered on either side.

    Simple

    Two tall stone towers flank the entrance to the castle.

    In context

    The president walked toward the podium, flanked by security guards and senior advisors.

  5. 05 C1 Advanced Formal Law

    v.to move around the side of an enemy to attack them from a weaker spot.

    v.to maneuver around the side of an opposing force so as to outflank or bypass their frontal defenses.

    Simple

    The soldiers tried to flank the enemy instead of attacking from the front.

    In context

    By successfully flanking the opposing battalion, the troops were able to seize the hilltop without a direct confrontation.

    outmaneuverbypass
  6. 06 C2 Proficiency American EnglishTechnical

    adj.the fastest speed a ship can go, usually used in an emergency.

    adj.referring to the maximum possible speed of a vessel, exceeding 'full speed'.

    Simple

    The captain ordered flank speed to reach the sinking boat as fast as possible.

    In context

    The destroyer maintained flank speed for several hours during the pursuit, testing the limits of its propulsion system endurance.

    Usage

    Usually used in the phrase 'flank speed'.

He led with a photo of him and his kids – sons Xavier, 18, and Hadien, 12, and 17-year-old daughter Ella Grace – flanking his mother Margaret.

Toronto Sun· 14 Aug 2026

Nuno Mendes galloped on to Kvaratskhelia’s flipped pass but the full-back’s cutback from the left flank evaded the £43m summer buy Maghnes Akliouche and three other blue and red shirts.

The Guardian· 12 Aug 2026

From Late Middle English flanc, from Late Old English flanc (“flank”), from Old French flanc, of Germanic origin, probably Frankish hlanca, from Proto-Germanic hlankō (“bend, curve, hip, flank”), from Proto-Germanic hlankaz (“flexible, sleek, bendsome”), from Proto-Indo-European kleng- (“to bend”). Akin to Old High German hlanca (“loin”), Middle Low German lanke (“hip joint”) (German lenken (“to bend, turn, lead”)), Old English hlanc (“loose, slender, flaccid, lank”). More at lank.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin ine-pro *kleng-
Level C1 · Advanced
Frequency Frequent
Updated