diamond

B1 · Intermediate Countable noun Mathematics

n. a shape with four straight sides of the same length, usually standing on one of its points.

n. a plane figure with four equal sides and two acute and two obtuse angles; a rhombus.

“The road sign was a yellow diamond with a black arrow in the middle.”

“The pattern on the floor consisted of alternating black and white diamond tiles, creating a striking visual effect in the hallway.”

B1 · Intermediate Plural noun

n. one of the four groups in a pack of cards, shown by a red diamond shape.

n. one of the four suits of playing cards, represented by a red lozenge-shaped symbol.

日本語:ダイヤ※

“I have the ace of diamonds in my hand, so I might win this round.”

“The player discarded a low diamond, hoping to draw out the opponent's higher cards from the same suit.”

B2 · Upper Intermediate Countable noun Sports American English

n. the area of a baseball field where the game is played.

n. the entire field of play in baseball, or specifically the square area formed by the four bases.

“The players ran onto the diamond as the crowd started to cheer.”

“Heavy rain overnight left the diamond too muddy for the championship game to proceed as scheduled.”

B2 · Upper Intermediate

adj. used to describe the 60th anniversary of an important event, like a wedding.

adj. relating to or denoting the sixtieth anniversary of a significant event, such as a wedding or a monarch's reign.

“The couple celebrated their diamond wedding anniversary with their whole family.”

“The city organised a grand parade to mark the Queen's diamond jubilee, celebrating sixty years of her service.”

C1 · Advanced British English · Slang · Informal

adj. very good or high quality.

adj. denoting high quality, excellence, or reliability.

“Thanks for helping me move house; you're a diamond.”

“He's a diamond of a colleague, always willing to stay late when the rest of the team is struggling with a deadline.”

C2 · Proficiency Uncountable noun Computing Technical · Archaic

n. a very small size of text used in old printing.

n. a traditional size of type, approximately 4.5 points, positioned between brilliant and pearl.

“The old prayer book was printed in diamond type, making it very hard to read.”

“The compositor noted that the footnotes were set in diamond, a size rarely used in modern publishing due to legibility concerns.”

C2 · Proficiency Literary

v. to decorate something with diamonds.

v. to adorn or stud a surface with diamonds or diamond-like ornaments.

“The morning dew diamonded the spider's web in the garden.”

“The artisan diamonded the hilt of the ceremonial sword, ensuring it caught the light during the procession.”