English to English Dictionary

Optimization

The action of making the best or most effective use of a situation or resource.

Option

A thing that is or may be chosen.

Optometrist

A health care professional who examines eyes for visual defects and prescribes corrective lenses.

Orderly

Neatly and methodically arranged, organized, or conducted.

Ordinary-level

A former subject-based academic qualification in the UK (except Scotland), usually taken by students aged 15 or 16, replaced by the GCSE.

Organelle

Any of a number of organized or specialized structures within a living cell.

Organization

An organized body of people with a particular purpose, such as a business, government agency, association, or charity.

Organza

A thin, stiff, transparent fabric traditionally made of silk, now also made of synthetic fibers like polyester.

Orientation

The determination of the relative position of something or someone (especially oneself) in relation to the points of compass or other specific directions.

Origin

The point or place where something begins, arises, or is derived.

Original

Present or existing from the beginning; first or earliest.

Orthodontics

The branch of dentistry concerned with the prevention and correction of irregularities of the teeth.