addition

B1 · Intermediate Countable noun

n. a person or thing that is newly added to a group or place.

n. a person or thing that is added to an existing group, collection, or structure.

“The baby is a wonderful new addition to their family.”

“The latest addition to the museum's permanent collection is a rare landscape painting from the seventeenth century.”

A2 · Elementary Uncountable noun Mathematics

n. the process of calculating the total of two or more numbers.

n. the arithmetic operation of summing two or more numbers or quantities.

“Children usually learn addition and subtraction before they try multiplication.”

“The primary school curriculum focuses on mastering basic addition and subtraction before introducing more complex algebraic concepts.”

C1 · Advanced Countable noun Science Technical

n. a reaction where two or more molecules combine to form a larger one.

n. an organic reaction in which two or more molecules combine to form a single larger product without the loss of any atoms.

“In this experiment, an addition reaction creates a new compound.”

“The hydrogenation of ethene is a classic example of an addition reaction where hydrogen atoms bond to the carbon atoms of the double bond.”

C2 · Proficiency Countable noun Music Technical

n. a small dot next to a musical note that makes it sound longer.

n. a dot placed to the right of a note head to indicate that the duration of the note is to be increased by half.

“The addition of a dot to the half note means it lasts for three beats.”

“The composer used rhythmic additions to create a sense of syncopation throughout the second movement of the sonata.”