Now, let's look at a word.
adjective, hap·pi·er, hap·pi·est.
1. delighted, pleased, or glad, as over a particular thing: to be happy to see a person.
2. characterized by or indicative of pleasure, contentment, or joy: a happy mood; a happy frame of mind.
3. favored by fortune; fortunate or lucky: a happy, fruitful land.
4. apt or felicitous, as actions, utterances, or ideas.
5. obsessed by or quick to use the item indicated (usually used in combination): a trigger-happy gangster.
Now, let's think about other ways of saying "happy."
Delighted gives you the impression that someone is surprised by good news. [She was delighted when she heard he was throwing a party.]
Pleased gives you the impression that someone is mildly happy, more than content but less than delighted. [Yes, I'm very pleased she could come.]
Glad gives you the impression that someone is relieved about something. [I'm so glad it all worked out.]
Joyous is used more often for an occasion or event than a person. [It was a joyous day and all the birds were singing to the pervading sunshine.]
Merry is a more lighthearted kind of happy. [He was predisposed to be merry.]
Elated gives the impression of complete and utter happiness. [I was elated when I heard you were going to be married]
Thrilled gives you the impression of a more intense, moving happiness. [She looked thrilled when you said she could come along.]
Happiness comes in all shapes and sizes, so you can stay happy no matter what the occasion!