Synonym: bright, carefree, cheerful, glad, happy, jaunty, lighthearted, pleasant, radiant. Antonym: pessimistic. Similar words: artistic, by this time, realistic, statistics, statistical, sophisticated, characteristic, option. Meaning: ['ɑptɪmɪstɪk /'ɒp-] 
adj. 1. expecting the best in this best of all possible worlds 2. expecting the best.
adj. 1. expecting the best in this best of all possible worlds 2. expecting the best. 
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211. Through fuzzy interval arithmetic based on level sets and optimistic index the entropy weight is given, then the thesis analyses and evaluates maintenance project according to entropy weight.
212. The algorithm include lock-based algorithm, timestamp-based algorithm, optimistic algorithm and centralized algorithm.
213. Even the most optimistic futurists don't think we have more than 40 years, 50 tops , of our oil future.
214. On the other hand, our Risk Premium model is decidedly on the optimistic end of our valuation models.
More similar words: artistic, by this time, realistic, statistics, statistical, sophisticated, characteristic, option, adoption, timing, antiseptic, chemistry, by mistake, economist, stimulus, estimate, stick to, plastic, stick out, stimulate, estimated, testimony, domestic, distinct, do justice, fantastic, existing, assist in, consist in, distinctive.