The act of opposing or resisting, The condition of being in conflict; antagonism, Placement opposite to or in contrast with another, Something that serves as an obstacle

To make a choice or decision, To choose; to select, To choose; to select

Of or relating to sight; visual, Designed to assist sight, Of or relating to optics, Relating to or using visible light

The branch of physics that deals with light and vision, chiefly the generation, propagation, and detection of electromagnetic radiation having wavelengths greater than x-rays and shorter than microwaves, physics The physics of light and vision, The light-related aspects of a device, figuratively Perception, image, public relations

Most favorable or desirable; optimum, Best possible; most desirable; optimum, The best, most favourable or desirable, especially under some restriction

The act of optimizing or taking an optimistic view of; the act of turning to the best account or making the best of, the design and operation of a system or process to make it as good as possible in some defined sensee

To make as perfect or effective as possible, computers To increase the computing speed and efficiency of (a program), as by rewriting instructions, to make the most of

The point at which the condition, degree, or amount of something is the most favorable, Biology The most favorable condition for growth and reproduction, adjective_ Most favorable or advantageous; best, most desirable possible under a restriction expressed or implied

The act of choosing; choice, The power or freedom to choose, The right, usually obtained for a fee, to buy or sell an asset within a specified time at a set price, Choice; wish; preference; election, transitive verb_ To acquire or grant an option on

Left to choice; not compulsory or automatic, Involving an option; depending on the exercise of an option; left to one's discretion or choice; allowed but not compulsory