Vocabulary Words
optimistic
B2adjective
Allowing other processes to perform transactions on the same data at the same time, and checking for conflicts only when changes need to be written back. (+1 more)
option
B1noun, verb
A contract giving the holder the right to buy or sell an asset at a set strike price (+5 more)
optional
B2adjective, noun
(sometimes capitalized) In various programming languages, a kind of variable that is assigned a specific data type but may or may not hold an actual value. (+4 more)
or
A1adjective, adverb, conjunction, noun, preposition
(operations) The application of scientific methods and techniques to problems of decision making, especially in business management and government administration. (+17 more)
orange
A1adjective, noun, verb
An evergreen tree of the genus Citrus such as Citrus sinensis. (+11 more)
orbit
B1noun, verb
A circular or elliptical path of one object around another object, particularly in astronomy and space travel. (+14 more)
orchestra
B1noun
A large group of musicians who play together on various instruments, usually including some from strings, woodwind, brass and/or percussion (+3 more)
order
A1noun, verb
(chiefly plural) An ecclesiastical grade or rank, as of deacon, priest, or bishop (+46 more)
orderly
B1adjective, adverb, noun
A hospital attendant given a variety of non-medical duties. (+14 more)
organ
B1noun, verb
(by extension) A body of an organization dedicated to the performing of certain functions. (+7 more)
organic
B1adjective, noun
(of search results) Generated according to the ranking algorithms of a search engine, as opposed to paid placement by advertisers. (+15 more)
organism
B1noun
(by extension) Any complex thing with properties normally associated with living things. (+1 more)
organizer
B2noun
A group of cells that, together with the evocator, control differentiation in the embryo (+4 more)