What exactly is "夢" and why is it used so much?

Question

I think it is rather clear if one listens to enough Japanese songs that "夢" is used all the time; it is in many corporate messages as well from the commercials I recall. As a song example, I am currently studying 心臓 by TOOBOE, and this line is the first:

ある日アンタは言った「私に夢の続き見せて」と

The song and music video clearly present a false idea of love by the narrator, but why "dream" here? I assume "dream" here refers to the idea of what their relationship will become of (thus "dream" is synonymous with "ideal" or "outcome"), and how the partner seeks to know what the other will do next, but is this to assume that no other word can convey this concept?

つまり, when the word "夢" is said, is the idea of "outcome/future" the right synonym?

EDIT: "夢" is "dream," yes, but that does not explain why it is used all the time when it comes to relationships and slogan-ing.

Answer 1

The song and music video clearly present a false idea of love by the narrator, but why "dream" here? I assume "dream" here refers to the idea of what their relationship will become of (thus "dream" is synonymous with "ideal" or "outcome"), and how the partner seeks to know what the other will do next, but is this to assume that no other word can convey this concept?

I really struggle with following your logic... I don't understand why you thought there was no word to convey the concepts of ideal and outcome. Of course, we do have words for them. I also don't understand how you'd come up with the interpretation of "continuation of the outcome" or "continuation of the ideal" from the context of the lyrics, including the music video. I don't understand which part of the lyrics represent "the false idea of love".

Based on the music video, "Show me the continuation of my dream" may have been a (fairly roundabout) way of making a marriage proposal. Isn't it sufficient to simply think that having a wonderful romance and building a happy home was the dream of the person?

when the word "夢" is said, is the idea of "outcome/future" the right synonym?

No.

"夢" is "dream," yes, but that does not explain why it is used all the time when it comes to relationships and slogan-ing.

Do corporate slogans really feature the word 夢 so frequently? I couldn't think of any. After googling, I found something like this and this, but it's far from "all the time". Tokyo Disneyland is often nicknamed as 夢の国, and a red-light district is sometimes poetically described as something like 一夜限りの夢, but I suppose these are expressions English speakers can easily understand.