What is the meaning of love?

What exactly is the meaning of love? Is it something that can be seen, felt and touched?

Love is like a cup of unsweetened coffee. If he is not given a touch of sugar then bitter taste. But if he was given a touch of sugar then sweet taste.
Love is the four man-made letters that make us feel happiness or disappointment. happiness is like getting a lot of votes from friends steemit friends, and disappointed it can be felt when he prefers cheating and leave you 😁