verb

• (transitive) To attack the flank(s) of.
• (transitive) To defend the flank(s) of.
• (transitive) To place to the side(s) of.
  "Stately colonnades are flank'd with trees."
• (intransitive) To be placed to the side(s) of something (usually in terms of two objects, one on each side).

noun

• (anatomy) The lateral flesh between the last rib and the hip.
  "Holonym: side"
• (cooking) A cut of meat from the flank of an animal.
• (military) The extreme left or right edge of a military formation, army etc.
• (military) The sides of a bastion perpendicular to the wall from which the bastion projects.

adj

• (US, nautical, of speed) Maximum. Historically faster than full speed (the most a vessel can sustain without excessive engine wear or risk of damage), now frequently used interchangeably. Typically used in an emergency or during an attack.
  "All ahead flank!"