Definition of rotation in English:



  • 1The action of rotating around an axis or center.

    ‘the moon moves in the same direction as the earth's rotation’
    • ‘Venus does have a very slow rotation: one day/night period takes 117 Earth days, but the cloud whizzes round in just four, and scientists so far have no explanation for it.’
    • ‘In fact, the panels are modular and there is only one layout of folds, with variation introduced by random rotation.’
    • ‘The base is equipped with three omni-wheels with independent control of rotation that allow movement in any direction.’
    • ‘The ship slowly began its rotation to meet the triangle as the man turned and retreated back down the ramp.’
    • ‘The earth moves around the sun in an orbit that is nearly a circle, and the axis of rotation of the earth maintains an effectively fixed direction.’
    • ‘It is built around the idea of rotation, an elemental movement shared by wheels, the Earth, steering wheels and wind turbines.’
    • ‘He'd been in the garden many times, but only to practice setting the solar panels for optimum output at peak hours during the rotation of planet, sun and station.’
    • ‘He discovered the rotation of the earth on its axis and found in this the causes of day and night.’
    • ‘The volumetric elements are built up of large triangular planes that twist, giving the whole work a jagged sense of rotation.’
    • ‘Proper time for an ordinary mechanical clock is recorded by the number of rotations of the hands of the clock.’
    • ‘The tire being still in rotation, I applied more weight to the front now, and down we came towards the ground, utterly clearing the wall.’
    • ‘The rest of the station's ‘gravity’ is merely centripetal force from its rotation.’
    • ‘It'll take about 5-6 rotations counterclockwise to loosen the screws enough to remove the back panel.’
    • ‘This joint allows rotation to accommodate movement due to thermal expansion of the arches.’
    • ‘Manipulating it is simple enough thanks to an orb capable of 2D movement, zooming and rotation on both axes.’
    • ‘Its chambers and tunnel will allow visitors to perceive the earth's rotation and its changing alignments with the stars.’
    • ‘To determine the extent of their external rotation, dancers should stand in first position with straight knees and no rolling over.’
    • ‘Loop as movement presupposes joint rotation between here and there, up and down, edge and center.’
    • ‘With the motion and rotation of Earth, the coordinates dance all around in a strange mess that is extremely difficult to untangle.’
    • ‘When we deal with a quantitative thing like rotations in pirouettes, that's fairly simple.’
    revolving, turning, spinning, gyration, wheeling, whirling, twirling, swivelling, circling
    turn, revolution, spin, whirl, orbit
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    1. 1.1The action or system of rotating crops.
      • ‘Forage soybeans also can be used as a one-year forage crop in rotation with corn.’
      • ‘The need for a cover crop for crusting control should decline after several cycles of a corn-soybean rotation because organic matter builds at the soil surface, which will tend to reduce crusting.’
      • ‘On about 9% of the land, the solution is a 3-year crop rotation, including both rice varieties and soybeans.’
      • ‘Red rice density is modeled as a function of seed bank, emergence rate, and the kill rates associated with the crops in rotation.’
      • ‘To organic farmers, this is not crop rotation, indeed, this is what our certifier calls ‘crop oscillation’.’
      • ‘Also, yields of corn increased 38 percent and wheat yields increased 81 percent when these crops were grown in rotation with cotton.’
      • ‘In the end, the open-field system of crop rotation was an obstacle to increased agricultural productivity.’
      • ‘This, along with a diverse crop and cover crop rotation, seems to discourage the buildup of their populations.’
      • ‘Flax has been found to be a good candidate for growing in rotation with cotton in the Southeast, particularly along coastal areas.’
      • ‘Northern European farmers also began to experiment with the three-field system of crop rotation.’
      • ‘After being in pasture, the land goes through a 4-year crop rotation including one year in beans.’
      • ‘He farms an 830-acre varied crop rotation of corn, soybeans, hay, oats, wheat, and clover - all of which is certified organic.’
      • ‘He uses cow manure, green manure and crop rotation to ensure nutrient-rich soil for his rapeseed crop.’
      • ‘With the traditional corn/soybean rotation, producers plant corn before soybeans for maximum corn yields.’
      • ‘It appears that factors of fall moisture, winter exposure, leaf diseases, and early summer heat are larger than crop rotation and or tillage method.’
      • ‘Disease-resistant varieties, crop rotation, and tillage are especially important in management of wheat diseases.’
      • ‘The use of summer fallow, crop rotation, and improved tillage were even less common than in Ontario.’
      • ‘The cotton-flax crop rotation provides producers an alternative crop for traditionally dormant fields.’
      • ‘The depletion process is accelerated, however, when cotton is grown in rotation with high K-requiring crops such as alfalfa and corn silage.’
      • ‘His initial efforts were devoted to improving the condition of his fields and implementing a system of crop rotation which would build them up.’
    2. 1.2Forestry The cycle of growth and felling or cutting of trees.
      • ‘Finally, the super tree would shorten the time required to grow to a merchantable size, thus reducing the time to the next rotation.’
      • ‘If the forest has a non-timber value, for instance, in terms of its recreation value or its value as a wildlife habitat, then this changes the socially optimal forest rotation.’
      • ‘The region also plays host to a large number of birches to add variety, a component that forest management plans aim to maintain past the current rotation.’
      • ‘Initial growth rates can be improved for higher assurance of success and shorter rotations.’
      • ‘In Canada, a seed's genetic worth is forecast at full rotation from ten-year field data.’
    3. 1.3The passing of a privilege or responsibility from one member of a group to another in a regularly recurring succession.
      ‘it has become common for senior academics to act as heads of department in rotation’
      • ‘For successful implementation over time, the core team necessarily must expand, yet excessive rotation of new members early on may diminish success.’
      • ‘They must now live with the fact that from 2014 the Commission will be cut from 25 to 18, with each country taking a turn in rotation.’
      • ‘The two pieces are now joined together and are held in turn by each museum on a three year rotation.’
      • ‘There are occasions where there are two Bards sharing the telling in rotation, enabling an even more embellished tale to be told.’
      • ‘The Treaty of Nice provided that before the union's membership reached 27 members a decision would be taken on a smaller commission, based on equal rotation among the member states.’
      • ‘If there are more than two players, they take turns in clockwise rotation, beginning with the player to dealer's left.’
      • ‘The leading seaman in each mess was called ‘the caterer’ and he chose ‘the cook-of-the-day’, a job that went by rotation.’
      • ‘Four bishops of the Church of Ireland, serving in rotation, also entered the Lords.’
      • ‘Their substantial independence threatened republican tradition with its corporate government and brief periods of high office for individuals in rotation.’
      • ‘Regular rotation of committee members assures a continuous source of new ideas and perspectives.’
      • ‘Gurkha battalions have been stationed there in rotation for the past twenty-five years.’
      • ‘The President of the European Council will now serve for two-and-a-half years, replacing the current six-monthly rotation.’
      • ‘After Tito's death, the presidency was shared between the states in rotation.’
      • ‘Any one set may be in play for more than one turn in rotation between the players.’
      • ‘She would get 1 and half weeks off of training and then be in regular rotation.’
      • ‘The stands were always filled whenever it was your turn on the rotation.’
      • ‘Winger's indecision faded as the klaxon went off, signaling shift rotation, and he bolted into action.’
      • ‘During the first two years of the course, we'll do dissection weekly and living anatomy frequently: in the third year, on clinical rotation, we'll still be coming back into the DR to look at specific organs.’
      • ‘Therefore rotation of tasks was feasible, and would prevent a status hierarchy developing on the basis of specialised roles.’
      sequence, succession
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    4. 1.4US A tour of duty, especially by a medical practitioner in training.
      ‘she was completing a rotation in trauma surgery’
      • ‘They focus on core programs in analytics, and then have a very experiential period - similar to the clinical rotations used in other professions.’
      • ‘In my senior year, I was completing a clinical rotation in the OR with this nurse as my preceptor.’
      • ‘Students from programs in other departments are on four-month rotations for up to five years.’
      • ‘Kate told Stephen how she got on the accelerated Medicine program at Boston University and that all of her rotations would transfer over to UIC except the ER.’
      • ‘Classroom training is then combined with hands-on experience that includes a general rotation in every department of the company.’
      • ‘She met her co-first year resident who would be sharing most of her rotations that year.’
      • ‘Does the company have a policy of mandatory vacations and job rotations?’
      • ‘What are the biggest problems with keeping these troops on these extended rotations in very hostile environments?’
    5. 1.5Mathematics The conceptual operation of turning a system around an axis.
    6. 1.6Mathematics
      another term for curl


Mid 16th century: from Latin rotatio(n-), from the verb rotare (see rotate).