All 4 Uses

Titans
in
The War of the Worlds
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As it did so a second glittering Titan built itself up out of the pit.†
Chpt 1.11
It was the first Martian my brother had seen, and he stood, more amazed than terrified, watching this Titan advancing deliberately towards the shipping, wading farther and farther into the water as the coast fell away.†
Chpt 1.17
Its seeds were simply poured down into the water of the Wey and Thames, and its swiftly growing and Titanic water fronds speedily choked both those rivers.†
Chpt 2.6 *
I marched on recklessly towards this Titan, and then, as I drew nearer and the light grew, I saw that a multitude of black birds was circling and clustering about the hood.†
Chpt 2.8 *

Definitions:

(1) (Titans as in: the mythological Titan, Atlas)
Greek mythology: the giant-sized gods who ruled the Earth until overthrown by Zeus

Atlas (often seen holding the earth) is perhaps the best known Titan. The Titans were offspring of Uranus (Heaven) and Gaea (Earth).
(2) (titan as in: titan of industry)
something or someone that is very large or powerful
(3) (Titanic as in: sinking of the Titanic)
large British passenger ship that hit an iceberg and sank -- killing about 1500 people in 1912
(4) (meaning too rare to warrant focus)
Saturn's largest moon is named "Titan" because of its size.