What is the definition of expretion?

Answer 1

In math, an "expression" is any combination of numbers and symbols that you can calculate to get a number. Thus, assuming the variables represent numbers, all of the following are expressions:

7

x

x + 5

square root of 2

sine of pi

a + b times c

In computer science, you can also have "expressions" that result in other types of data, for example a text, or a date.

Answer 2

According to Princeton's online dictionary:

• the feelings expressed on a person's face; "a sad expression"; "a look of triumph"; "an angry face"
• expression without words; "tears are an expression of grief"; "the pulse is a reflection of the heart's condition"
• the communication (in speech or writing) of your beliefs or opinions; "expressions of good will"; "he helped me find verbal expression for my ideas"; "the idea was immediate but the verbalism took hours"
• saying: a word or phrase that particular people use in particular situations; "pardon the expression"
• formulation: the style of expressing yourself; "he suggested a better formulation"; "his manner of expression showed how much he cared"
• formula: a group of symbols that make a mathematical statement
• (genetics) the process of expressing a gene
• construction: a group of words that form a constituent of a sentence and are considered as a single unit; "I concluded from his awkward constructions that he was a foreigner"
• the act of forcing something out by squeezing or pressing; "the expression of milk from her breast"

Answer 3

There is no such word, -gibberish.