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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.

optimize

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

optionally

adverb · in an optional manner

Example: this rule is applied optionally

or else

adverb · in place of, or as an alternative to

Example: Felix became a herpetologist instead

or so

adverb · (of quantities) imprecise but fairly close to correct

Example: lasted approximately an hour

orally

adverb · by spoken rather than written means

Example: these stories were transmitted by word of mouth

orchard grass

noun · widely grown stout Old World hay and pasture grass

orchestral

adjective · relating to or composed for an orchestra

Example: orchestral score

orchestrate

verb · plan and direct (a complex undertaking)

Example: he masterminded the robbery

orchid cactus

noun · any cactus of the genus Epiphyllum having flattened jointed irregularly branching stems and showy tubular flowers

order auriculariales

noun · coextensive with the family Auriculariaceae; sometimes included in the order Tremellales

order fagales

noun · an order of dicotyledonous trees of the subclass Hamamelidae

order galliformes

noun · pheasants; turkeys; grouse; partridges; quails; chickens; brush turkeys; curassows; hoatzins

order ornithischia

noun · extinct terrestrial reptiles having bird-like pelvises: armored dinosaurs (thyreophorans); boneheaded and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)

order pseudomonadales

noun · one of two usually recognized orders of true bacteria; Gram-negative spiral or spherical or rod-shaped bacteria usually motile by polar flagella; some contain photosynthetic pigments

order sphagnales

noun · coextensive with the genus Sphagnum; in some classifications isolated in a separate subclass

order urticales

noun · an order of dicotyledonous plants including Moraceae and Urticaceae and Ulmaceae

ordered

adjective · marked by an orderly, logical, and aesthetically consistent relation of parts

Example: a coherent argument

ordinal

adjective · being or denoting a numerical order in a series

Example: ordinal numbers

ordinarily

adverb · under normal conditions

Example: usually she was late

oregon cedar

noun · large timber tree of western North America with trunk diameter to 12 feet and height to 200 feet

oreo cookie

noun · chocolate cookie with white cream filling

organically

adverb · involving carbon compounds

Example: organically bound iodine

organise

verb · bring order and organization to

Example: Can you help me organize my files?

organised

adjective · being a member of or formed into a labor union

Example: organized labor

organizationally

adverb · with regard to organization

Example: organizationally, the conference was a disaster!

organize

verb · bring order and organization to

Example: Can you help me organize my files?

oriental bittersweet

noun · ornamental Asiatic vine with showy orange-yellow fruit with a scarlet aril; naturalized in North America

orientalise

verb · make oriental in character

Example: orientalize your garden

orientate

verb · determine one's position with reference to another point

Example: We had to orient ourselves in the forest

orientating

adjective · positioning with respect to a reference system or determining your bearings physically or intellectually

Example: noticed the bee's momentary orienting pause before heading back to the hive

originate

verb · bring into being

Example: He initiated a new program

ornately

adverb · in an ornate manner

Example: the cradle was ornately carved

ornithischia

noun · extinct terrestrial reptiles having bird-like pelvises: armored dinosaurs (thyreophorans); boneheaded and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)

ornithogalum thyrsoides

noun · South African perennial with long-lasting spikes of white blossoms that are shipped in to Europe and America for use as winter cut flowers

orozco

noun · Mexican painter noted for his monumental murals (1883-1949)

orphanhood

noun · the condition of being a child without living parents

Example: his early orphanage shaped his character as an adult

orthodontia

noun · the branch of dentistry dealing with the prevention or correction of irregularities of the teeth

orthodontic

adjective · of or relating to or involving or practicing orthodontics

Example: orthodontic braces

orthopaedic

adjective · of or relating to orthopedics

Example: orthopedic shoes

oscillate

verb · move or swing from side to side regularly

Example: the needle on the meter was oscillating

osculate

verb · touch with the lips or press the lips (against someone's mouth or other body part) as an expression of love, greeting, etc.

Example: The newly married couple kissed

osmund

noun · any fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters

osmundaceae

noun · large family of ferns widely distributed in temperate and tropical areas