(1):

(n.) An imaginary liquor capable of transmuting metals into gold; also, one for producing life indefinitely; as, elixir vitae, or the elixir of life.

(2):

(n.) Any cordial or substance which invigorates.

(3):

(n.) A tincture with more than one base; a compound tincture or medicine, composed of various substances, held in solution by alcohol in some form.

(4):

(n.) The refined spirit; the quintessence.