a condition (mostly in boys) characterized by behavioral and learning disorders
"The boy was diagnosed with ADD after his teachers noticed he struggled to focus on homework and often disrupted class."
Initialism of attention deficit disorder.
"The producer decided to add a new track to the morning radio show's playlist."
The addition of a song to a station's playlist.
In plain English: An add is an old-fashioned word for something that has been added to a list, but it's rarely used today because people just say addition or item instead.
"The recipe calls for two add-ins, such as chocolate chips or nuts."
make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of
"We added two students to that dorm room"
"She added a personal note to her letter"
"Add insult to injury"
"Add some extra plates to the dinner table"
To join or unite (e.g. one thing to another, or as several particulars) so as to increase the number, augment the quantity, or enlarge the magnitude, or so as to form into one aggregate.
"We need to add more ingredients to the soup to make it hearty enough for dinner."
In plain English: To add means to combine two things together so they become more than what you started with.
"I will add sugar to my coffee to make it taste better."
Usage: Use "add" when you combine items together to create a total sum rather than placing something beside another without changing its value. This verb applies whether you are calculating numbers in math or including new elements like songs into a list.
The word "add" comes from the Middle English term adden, which was borrowed from the Latin verb addō. In its original Latin form, this word meant to "add" or "give unto."