Definition of bisect in English:



[with object]
  • 1Divide into two parts.

    ‘a landscape of ploughland bisected by long straight roads’
    • ‘Several civil servants and non-governmental members told the subcommittee it could be fixed with reclamation or by bisecting the runway into two islands.’
    • ‘He hits a peach of a winning point which bisects the posts.’
    • ‘The woolly-minded sheep - not known for their intellectual prowess took a while to get the hang of the orange wire now bisecting the fell but its presence is paying off.’
    • ‘A major part of the Mid-Ocean Ridge system runs down the middle of the Atlantic Ocean, bisecting Iceland, and separating the Eurasian and African plates in the east from the North and South American plates in the west.’
    • ‘North we walked, three abreast, a mile and a half along a dusty track that penetrates and bisects the moor.’
    • ‘‘The loneliest highway in America,’ US50, bisects tens of millions of acres taken from native Americans years ago.’
    • ‘North Korea has one of the largest armed forces in the world with 1.1 million troops, many of them forward-deployed near the Demilitarised Zone that bisects the Korean peninsula.’
    • ‘A newly built road bisects the site, dramatically improving access to the M8 and M74.’
    • ‘The contrail went straight up, bisecting the Sun, forcing the crowd to squint and awkwardly block the Sun to see the contrail.’
    • ‘The river Seine bisects the city, the Right Bank is home to the grand boulevards and most monumental buildings, many dating from Haussmann's nineteenth-century redevelopment.’
    • ‘Currently Glasgow is a disunified city bisected by a river that most people are embarrassed by.’
    • ‘CN's mainline railway track bisects the Reserve, passing at some points within ten metres of houses.’
    • ‘Troops were then landed on April 25, the aim being to bisect the peninsula and sever the head of the Turkish resistance.’
    • ‘The city is situated at the southwestern end of Lac Leman, generally called Lake Geneva, which is also the country's largest lake, and astride the Rhone River, which bisects the city.’
    • ‘A double-glazed window bisects the room, which will separate MSPs from their secretaries.’
    • ‘The freeway bisects the state from Cincinnati to Cleveland and carries an average of 34,000 vehicles a day in the area, according to the Ohio Department of Transportation.’
    • ‘So common have these birds become that it is rare to drive down the great chalk cutting where the motorway bisects the Chiltern ridge, and not see one.’
    • ‘Any new roads must avoid bisecting koala habitat, include mitigation measures, reduce speed limits and provide for habitat restoration.’
    • ‘The traffic-free Corso Umberto I bisects the town and runs from the massive gates of Porta Messina to the equally impressive Porta Catania.’
    • ‘A few miles away, old Roger is taking his ease in a chair on the sunny main drag that bisects City Island, a placid outcrop of land humming gently with daytrippers and yachtsmen, the extreme eastern tip of New York City.’
    divide, disunite, separate, sever
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    1. 1.1Geometry Divide (a line, angle, or shape) into two exactly equal parts.
      • ‘This happens because any line that bisects an angle will also bisect the opposite side, and will be perpendicular to that side.’
      • ‘We proceed by constructing the perpendiculars at A and B to the line AB and bisecting the right angles at A and B.’
      • ‘He added another circle the same size as the first so that the two circles touched at the point where the straight line intersected them and the second circle was also bisected by the line.’
      • ‘The common perpendicular bisectors of parallel sides (the axes of symmetry of the trapezoids) bisect the angles of the triangle formed by the extensions of the three equal diagonals.’
      • ‘Using these simple tools they could construct equilateral triangles and hexagons and they could bisect any angle.’
      cut in half, halve, cut in two, divide in two, split in two, split down the middle, cleave, separate into two
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Mid 17th century: from bi- ‘two’ + Latin sect- (from secare ‘to cut’).