Yes, light snack is an idiom. You cannot eat a light as a snack! :)
A "light snack" refers to eating a small portion of food in between meal times. A "light snack" is not enough food to replace a meal or qualify as a meal.
An idiom is a phrase that seems to make no sense unless you know the definition. This makes sense, so it is not an idiom. Something caught the gleam of light from a shiny object.
An idiom is a phrase that makes no sense unless you know the idiomatic definition. Can a person really shine like a light? No, so that makes this an idiom. It means time for that person to come to the forefront and be recognized.
Yes
Can you figure out the meaning by defining the terms? Yes, so it's a phrase instead of an idiom.
The phrase "laid eyes on" is an idiom.
A light snack is a snack that is not heavy on your stomach. Eating a light snack at night is a good idea.
An idiom is a phrase that doesn't make any sense unless you know the idiomatic definition. This phrase means exactly what it looks like, so it's not an idiom.
An idiom is a phrase that doesn't make any sense unless you know the definition. This phrase makes perfect sense, so it is not an idiom. The room became quiet.
Stuck in a rut is a phrase, but I am not sure if an idiom is the same thing as a phrase. You may be thinking of a cliche and "stuck in a RUT" is a cliche. "Stuck in a road" is neither cliche nor idiom.
idiom
yes