of great influence or value

valuable, substantial

superb; splendid

glorious, wonderful

deserving to be remembered because special

noteworthy, significant

(attracting attention because) better than others; (of problems, work, payment etc) still to be attended to

superior, excellent

excellent; first class

excellent, first-rate

of the highest degree or quality; a form of an adjective or adverb expressing the highest degree (usually made by adding '-est' or with 'most'), such as 'happiest', 'longest', 'worst', 'most likely'

excellent, first-class