/ trəˈmendəs; NAmE / adjective
1.
very great
SYN huge :
a tremendous explosion
A tremendous amount of work has gone into the project.
2.
extremely good
SYN remarkable :
It was a tremendous experience.
► tre·men·dous·ly adverb :
tremendously exciting
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WORD ORIGIN
mid 17th cent.: from Latin tremendus (gerundive of tremere tremble) + -ous .