English word happy birthday comes from English happy, English birthday
| Dictionary entry | Language | Definition |
|---|---|---|
| happy | English (eng) | (intransitive) Often followed by up: to become happy; to brighten up, to cheer up.. (transitive) Often followed by up: to make happy; to brighten, to cheer, to enliven. Preceded by the: happy people as a group. (as a suffix to a noun) Favoring or inclined to use.. (rare) Of persons, especially when referring to their ability to express themselves (often followed by at or in): dexterous, [...] |
| birthday | English (eng) | (intransitive, informal) To celebrate one's birthday. The anniversary of the day on which someone is born. [From 1570s]. The anniversary of the day on which something is created.. The date on which someone is born or something is created, more commonly called birthdate or date of birth. |
| happy birthday | English (eng) | (colloquial, transitive) To wish (someone) a happy birthday. Said or written to a person who is celebrating his or her birthday in order to convey the good wishes of the speaker or writer (literally, "may you have a happy birthday"). |