Definition of re-entrant in US English:



  • 1(of an angle) pointing inward.

    The opposite of salient
    • ‘Its entrance, to the northeast on Vassar Avenue, is a re-entrant corner.’
    • ‘Mok's solution is simply to remove the re-entrant angles of the perimeter block and, in the process, frame magnificent views of mature trees just beyond the boundary of the site.’
    • ‘The resultant form is bold and distinctive and is further modelled by a re-entrant corner cutout, set directly above the sunken entrance court.’
    • ‘This will be the case if the projection of the c of g falls within an ‘area of support’, defined as that polygon, with no re-entrant angles, that just encloses the projections of all the available points of support.’
    • ‘Tools having diameters greater than about 80 mm or equivalent sections in flat dimensions are difficult to harden to full hardness if there are re-entrant corners.’
    • ‘Cracks most commonly occur at the re-entrant corners in sink openings, where the concrete is only 2 or 3 inches wide.’
    1. 1.1 Having an inward-pointing angle or angles.
      • ‘The mechanism is safe and re-entrant; the current flow of execution is saved and then restored to its state prior to the interruption.’


  • 1A re-entrant angle.

    ‘a sharp re-entrant in a material causes a local increase in stress’
    • ‘The aperture is commonly planar, without re-entrants, but the sub-apical surface may develop a median sinus which may be deep and slit like or even trematose, with a single perforation at the end of an elongate tube termed the snorkel.’
    1. 1.1 An indentation or depression in terrain.
      ‘they edged up a deep re-entrant to the top of the ridge’
      • ‘Ingenuity in section is elaborated in plan, in which each of the masses is articulated with deep re-entrants on the London Wall side.’
      • ‘The gates were protected by an ingenious system of re-entrants and switchbacks, designed to lead any attacker backward and forward under a rain of missiles.’
      • ‘In the posterior part of the occlusal surface there is a re-entrant that forms a shallow depression that finally disappears as the wear of this region advances.’
      • ‘In a plate-tectonic scenario, aulagogenic basins are those located at re-entrants on continental plate margins, and their initial formation is coeval with continental break-up.’
      • ‘The connection with the SuIa Sgeir Fan is clearly marked by a re-entrant at the shelf edge, shown by the landward deviation of the 150 m isobath.’
      • ‘Changes in margin orientation at the current location of the southern Antarctic Peninsula form an embayment or re-entrant.’
      • ‘When he put his foot on the accelerator we veered off the track plan and down into a re-entrant.’
      • ‘Lt-Col Lean said they identified an armed group of three or four people sited in protected positions near a rocky outcrop 100m further up the re-entrant.’
  • 2A person who has re-entered something, especially the labor force.

    ‘re-entrants who left to raise a family and are now seeking to get back in’
    • ‘However, during all of the nay saying, no one ever spoke of a weaning of the growth in our economy, no one ever talked about diminished opportunity for new entrants or re-entrants to the job market.’
    • ‘Table 6 also allows a contrast to be drawn between those in long term employment and recent entrants or re-entrants.’