What is the meaning of Doon?

Down.

Down.

On a lower level than before; down.

Alternative form of dun, an ancient or medieval fortification.

to do

to do

to put

to cause to, to make; forms causative verbs

often used instead of the preterit of weak verbs, with an infinitive.

always used in a subordinate clause with wenn, sometimes also with dat.

done

close, shut

fort, fastness

stronghold, bastion

down

down

want, hope, aspire

yonder; there (far from both the speaker and the person addressed)

Source: wiktionary.org