| OPTICIAN | • optician n. A person who makes or dispenses lenses, spectacles. • optician n. A person who sells lenses, spectacles etc. • OPTICIAN n. one who deals in optical goods. |
| OPTICIST | • opticist n. One who studies optics. • OPTICIST n. one engaged in the study of light and vision. |
| OPTIMATE | • optimate n. (Historical) A member of the patrician ruling class in republican Ancient Rome; an aristocrat, a noble. • OPTIMATE n. a member of the aristocracy. |
| OPTIMISE | • optimise v. Non-Oxford British spelling standard spelling of optimize. • OPTIMISE v. to make as effective as possible, also OPTIMIZE. |
| OPTIMISM | • optimism n. A tendency to expect the best, or at least, a favourable outcome. • optimism n. The doctrine that this world is the best of all possible worlds. • optimism n. The belief that good will eventually triumph over evil. |
| OPTIMIST | • optimist n. A person who expects a favourable outcome. • optimist n. A believer in optimism. • Optimist n. (Nautical) A small centre-board sailing dinghy designed to train and introduce young children into sailing. |
| OPTIMIZE | • optimize v. (Originally intransitive) To act optimistically or as an optimist. • optimize v. (Transitive) To make (something) optimal. • optimize v. (Transitive) To make (something) more efficient, such as a computer program. |
| OPTIMUMS | • optimums n. Plural of optimum. • OPTIMUM n. (Latin) the most favourable point of any condition. |
| OPTIONAL | • optional adj. Not compulsory; left to personal choice; elective. • optional n. Something that is not compulsory, especially part of an academic course. • optional n. (Programming, sometimes capitalized) In various programming languages, a kind of variable that is assigned… |
| OPTIONED | • optioned v. Simple past tense and past participle of option. • optioned adj. (In combination) Having the specified kind or number of options. • OPTION v. to grant the act of choosing. |
| OPTIONEE | • optionee n. The purchaser of a financial option. • OPTIONEE n. one who holds a legal option. |