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English Word Dictionary

Browse the admitted K-5 cohort, reading-linked candidates, and the locally materialized Open English WordNet reference layer. WordNet and Wiktionary entries are not automatic K5 admission.

once more

adverb · anew

Example: she tried again

oncologic

adjective · of or relating to or practicing oncology

Example: oncological nurse

oncorhynchus keta

noun · a large Pacific salmon with small spots on its back; an important food fish

one at a time

adverb · in single file

Example: the prisoners came out one by one

one million million

noun · the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen

one one's coattails

adverb · immediately following or undeservedly benefiting from

Example: the CEO resigned on the coattails of the scandal

one time

adverb · on one occasion

Example: once I ran into her

one-dimensional

adjective · of or in or along or relating to a line; involving a single dimension

Example: a linear measurement

one-eyed

adjective · having or showing only one eye

Example: one-eyed Jacks are wild

one-sidedly

adverb · in a unilateral manner; by means of one part or party

Example: they worked out an agreement unilaterally

onion louse

noun · injurious to onion plants and sometimes tobacco

only if

adverb · never except when

Example: call me only if your cold gets worse

only when

adverb · never except when

Example: call me only if your cold gets worse

onomastic

adjective · of or related to onomastics

Example: he published a collection of his onomastic essays

onomatopoeical

adjective · (of words) formed in imitation of a natural sound- Harry Hoijer

Example: onomatopoeic words are imitative of noises

onward

adverb · in a forward direction

Example: go ahead

onwards

adverb · in a forward direction

Example: go ahead

ooh

verb · express admiration and pleasure by uttering `ooh' or `aah'

Example: They oohed and aahed when they unwrapped the presents

oomph

noun · the activeness of an energetic personality

opacify

verb · become opaque

Example: the tissue in the eye's cornea may opacify and the patient may go blind

opah

noun · large elliptical brightly colored deep-sea fish of Atlantic and Pacific and Mediterranean

opalesce

verb · exhibit a play of colors like that of an opal

Example: This nitrate opalesces under certain conditions

opalescent

adjective · having a play of lustrous rainbow colors

Example: an iridescent oil slick

opalize

verb · replace or convert into opal

Example: opalized tree trunks

opaquely

adverb · in an opaque manner

Example: he referred opaquely to her recent past

open

adjective · ready for business

Example: the stores are open

open up

verb · make available

Example: This opens up new possibilities

opencut

adjective · (of mines and mining) worked from the exposed surface

Example: opencast mining

opening

adjective · first or beginning

Example: the memorable opening bars of Beethoven's Fifth

operate

verb · perform surgery on

Example: The doctors operated on the patient but failed to save his life

operate on

verb · perform surgery on

Example: The doctors operated on the patient but failed to save his life

operating

adjective · being in effect or operation- Leslie Marmon Silko

Example: de facto apartheid is still operational even in the `new' African nations

operational

adjective · being in effect or operation- Leslie Marmon Silko

Example: de facto apartheid is still operational even in the `new' African nations

operationalist

adjective · of or relating to or espousing operationalism

Example: operationalist doctrine

operationally

adverb · in respect to operation

Example: reported the machine operationally satisfactory

operator

noun · a shrewd or unscrupulous person who knows how to circumvent difficulties

operose

adjective · characterized by effort to the point of exhaustion; especially physical effort

Example: worked their arduous way up the mining valley

ophthalmic vein

noun · either of two veins that serve the eye; empties into the cavernous sinus

opine

verb · expect, believe, or suppose

Example: I imagine she earned a lot of money with her new novel

opisthocomus

noun · type genus of the Opisthocomidae: hoatzins

opportunely

adverb · at an opportune time

Example: he arrived rather opportunely just when we needed a new butler

opposing

adjective · characterized by active hostility

Example: opponent (or opposing) armies

opposite

adjective · of leaves etc; growing in pairs on either side of a stem

Example: opposite leaves

oppressed

adjective · burdened psychologically or mentally

Example: laden with grief

oppressively

adverb · in a heavy and oppressive way

Example: it was oppressively hot in the office

opsonisation

noun · process whereby opsonins make an invading microorganism more susceptible to phagocytosis

opt

verb · select as an alternative over another

Example: I always choose the fish over the meat courses in this restaurant

optically

adverb · in an optical manner

Example: optically distorted

optimise

verb · act as an optimist and take a sunny view of the world