adj. Not measured because it is so large it is difficult or impossible to do so.
the GNU version of the Collaborative International Dictionary of English
adj. Without measure; unlimited; immeasurable.
The Century Dictionary and Cyclopedia
Without measure; unlimited; immeasurable.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. without limits in extent or size or quantity
Word Usage
"... the nightmare corpse-city of R'lyeh ... was built in measureless aeons behind history by the vast, loathsome shapes that seeped down from the dark stars."