Often followed by up: to become happy; to brighten up, to cheer up.
Often followed by up: to make happy; to brighten, to cheer, to enliven.
Having a feeling arising from a consciousness of well-being or of enjoyment; enjoying good of any kind, such as comfort, peace, or tranquillity; blissful, contented, joyous. Example: Music makes me feel happy.
Experiencing the effect of favourable fortune; favored by fortune or luck; fortunate, lucky, propitious.
Content, satisfied (with or to do something); having no objection (to something). Example: Are you happy to pay me back by the end of the week?