An idiom usually is a sentence, or part of one. It certainly can be used as part of a sentence. The way to tell if it's an idiom is if it makes sense the way it's literally written.
idiom means expression like a page in a book
Idiom
An idiom is a saying or expression. There are many idioms that mean to stay away from, or avoid, someone. An example of such an idiom would be, "to steer clear of" someone.
I really don't know what you mean by Five Kinds ... the word "idiom" simply means a phrase that cannot be understood as spoken because it has come to mean something besides what it appears to mean.
An idiom is a form of expression in a general group or culture. Something like 'It's raining buckets.' This doesn't mean there are literal buckets falling it just means it's raining hard. You most likely will have to define what each idiom means.
idiom means expression like a page in a book
Quit bugging you-an expression.
This is not an idiom. An idiom is an expression whose meaning cannot be deduced from its elements. To go through fire and water for someone is easily understood to mean to make a special effort and to undergo difficulties for that person's sake.
Idiom
An idiom is a phrase or expression that typically cannot be understood by the literal meanings of its individual words. For example, "break a leg" is an idiom used to wish someone good luck in a performance, but it does not literally mean to break a leg.
This means that she can't wait to spend the money she has.
An idiom is a phrase that has a figurative meaning different from its literal meaning, while an idiomatic expression is a specific phrase or sentence structure that is characteristic of a particular language or dialect. Idioms are a type of idiomatic expression, but not all idiomatic expressions are idioms.
An idiom is a saying or expression. There are many idioms that mean to stay away from, or avoid, someone. An example of such an idiom would be, "to steer clear of" someone.
"Sour look" is an idiom for an expression of distaste or annoyance.
I really don't know what you mean by Five Kinds ... the word "idiom" simply means a phrase that cannot be understood as spoken because it has come to mean something besides what it appears to mean.
The idiom you have alluded to means to be placed precariously or unfavourably in a situation. The American expression "skating on thin ice" has a meaning that is synonymous and can be used interchangeably with the idiom in question.
I'm not sure what you mean by "italicized expression" here -- that term just means something that is printed in italic font.I also think maybe you mean OPPORTUNITY, which is not an idiom.