Deep and wide open: a gaping wound; a gaping hole. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "gaping" in a sentence
"That, PZ, is what we call a gaping whole in taxon sampling."
"That is what he calls the gaping wound near Redding known to everybody else as the Iron Mountain Mine, which is widely regarded by scientists as one of the most polluted places in the world."
"Together, the three massive bombings have sparked outrage among Iraqi lawmakers who want Prime Minister Nouri al-Maliki and his top aides be held accountable for what they describe as gaping, and continuing, security breaches."