say it: suhb-STAN-shuh-lee
substantially is an adverb meaning "to a great extent or degree". It carries 2 recorded senses.
to a great extent or degree
“I'm afraid the film was well over budget”
“painting the room white made it seem considerably (or substantially) larger”
“the house has fallen considerably in value”
“the price went up substantially”
in a strong substantial way
“the house was substantially built”
Definitions, synonyms and semantic relations for substantially come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.