alright

What it means

1. informalUsed to indicate acknowledgement or acceptance; OK.
2. informalAn expression of happiness.

   Alright! I passed my exam!

   Synonyms: aah, 'ave it, ay, ayy, awesome, aww yeah, boo-ya, booyah

3. UKinformalA generic greeting; hello; how are you.

   Synonyms: ciao, good morning, good day, good evening, good morrow, greetings, heaveno, hello

In a sentence

Where ever I go, both to and fro You have my heart alright.

1662 : Cantus, songs and fancies, to three, four, or five parts, both apt for voices and viols : with a brief introduction to musick, as is taught by Thomas Davidson, in the Musick-School of Aberdene by Thomas Davidson, iii. sig. B/1

Where it comes from

1. Proto-Indo-European*h₂el-der.?
2. Proto-Indo-European*h₂elnós
3. Proto-Germanic*allaz
4. Proto-West Germanic*all
5. Old Englisheall
6. Middle Englishall
7. Englishall
8. Englishright
9. Englishalright

Univerbation of all + right. Compare Old English eallriht (“all-right, just, exactly”) (from eall + riht), equivalent to al- (“all”) + right.