# Definition of *diagonal* in English:

## diagonal

## adjective

- Draw two diagonal lines dividing the square and the rectangle into triangles.
- One option is to draw a diagonal line between two opposite points to represent movement between here and there.
- The design was very nice, with diagonal lines forming a grid, each square filled with a snapshot of the movie in rich, warm tones.

*a tie with diagonal stripes*

- The film, with the exception of one shot, is composed of precisely two camera angles: a diagonal shot from the dashboard towards the passenger seat, and another, similar shot towards the driver seat.
- Pencil-thin diagonal blues and greens angle across the surface like tracer-bullet tracks streaking across a movie screen.
- Score the squid by holding the knife at an angle and making diagonal cuts, taking care not to cut right through.

## noun

- Do this at a diagonal, from one corner of the square to the opposite corner.
- For example, the Pythagoreans did not expect to uncover irrational numbers in the diagonal of a square.
- The particular tablet which concerns us is not one relating to administration but one which presents a geometrical problem which asks for the dimensions of a rectangle whose area and diagonal are known.

*Mathematics*The set of elements of a matrix that lie on a line joining two opposite corners.

- The alpha values and the mean interitem correlations are presented in the diagonals of the matrices in Table 2.
- The diagonal of the rate matrix is specified such that the row sums are equal to zero.
- If we restrict ourselves to the 2x2 arrays whose diagonals lie on the main diagonal of the table, then the sum of four numbers in the array is always a perfect square.

*the bars of light made diagonals across the entrance*

*tiles can be laid*

**on the diagonal**- Let stand ten minutes, then slice very thin and on the diagonal.
- Take cuttings from last seasons growth, cut just below the bud and trim the top on the diagonal.
- The paintings are thick with diagonals; light is pure color, color is pure stroke.

*Chess*A slanting row of squares whose colour is the same.

- If you move a pawn to open up a diagonal for a bishop, then should you usually NOT move up another pawn to develop the bishop on the other diagonal.
- After a queen pawn opening, Hort threatened mate on the long diagonal.
- As frequently happens in such a situation, White does not have a diagonal for his dark Bishop, nor does he have any other diagonals from which to aim at his opponent's King.

## Origin

Mid 16th century: from Latin *diagonalis*, from Greek *diagōnios* 'from angle to angle', from *dia* 'through' + *gōnia* 'angle'.

**pentagon**from late 16th century:The Greek expertise in geometry means that many geometrical forms have Greek names. The five-sided pentagon is formed from

*penta*‘five’ and*gonia*‘angle’, just as**polygon**(late 16th century) is formed from the word for ‘many’ plus -*gon*and**diagonal**(mid 16th century) with*dia*‘through’.*Penta*is also found in words such as the mystic figures of the**pentangle**(Late Middle English),**pentacle**(late 16th century), and**pentagram**(mid 19th century), and in the**pentathlon**(early 17th century), once the original five events of leaping, running, discus-throwing, spear-throwing, and wrestling of ancient Greek and Roman games. Fifty is found in**Pentecost**(Old English) which came via ecclesiastical Latin from Greek*pentēkostē (hēmera)*‘fiftieth (day)’. The Jewish festival of Shavuoth is held on the fiftieth day after the second day of Passover. The Christian festival is held on the seventh Sunday after Easter commemorating the descent of the Holy Spirit on the disciples as recorded in Acts 2.

## Words that rhyme with diagonal

heptagonal, hexagonal, octagonal, tetragonal## Definition of **diagonal** in:

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