'Fountain of Youth' definitions:

Definition of 'Fountain of Youth'

noun

A fountain described in folk tales as able to make people young again; "Ponce de Leon discovered Florida while searching for the Fountain of Youth"

Definition of 'Fountain of youth'

From: GCIDE

Fountain \Foun"tain\ (foun"t[i^]n), n. [F. fontaine, LL. fontana, fr. L. fons, fontis. See 2d Fount.]
1. A spring of water issuing from the earth. [1913 Webster]
2. An artificially produced jet or stream of water; also, the structure or works in which such a jet or stream rises or flows; a basin built and constantly supplied with pure water for drinking and other useful purposes, or for ornament. [1913 Webster]
3. A reservoir or chamber to contain a liquid which can be conducted or drawn off as needed for use; as, the ink fountain in a printing press, etc. [1913 Webster]
4. The source from which anything proceeds, or from which anything is supplied continuously; origin; source. [1913 Webster]
Judea, the fountain of the gospel. --Fuller. [1913 Webster]
Author of all being, Fountain of light, thyself invisible. --Milton. [1913 Webster]
Air fountain. See under Air.
Fountain heead, primary source; original; first principle. --Young.
Fountain inkstand, an inkstand having a continual supply of ink, as from elevated reservoir.
Fountain lamp, a lamp fed with oil from an elevated reservoir.
Fountain pen, a pen with a reservoir in the handle which furnishes a supply of ink.
Fountain pump. (a) A structure for a fountain, having the form of a pump. (b) A portable garden pump which throws a jet, for watering plants, etc.
Fountain shell (Zool.), the large West Indian conch shell (Strombus gigas).
Fountain of youth, a mythical fountain whose waters were fabled to have the property of renewing youth. [1913 Webster]