(rare in the singular) One of a pair of Wellington boots.

The source of water for a stream, spring or well; a fountainhead; a wellhead. / (figuratively) A perennial source of anything; a fountainhead of supply or emanation; resource.

The place where a spring breaks out of the ground; the source of water for a stream or well. / (figuratively) The source of something; a fountainhead. / The surface structure of an oil well etc.

The hole produced when drilling an oil or gas well.

plural of wellbore

Alternative spelling of well-being

plural of wellbeing

Old people who are in good health

Alternative letter-case form of Wellington (the boot).

(chiefly archaic, literary) Expression of sadness, regret, remorse, etc., alas, "woe"!