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oil shale noun : a rock (as shale) from which oil can be recovered

oil·skin noun 1 : an oiled waterproof cloth

2 : an oilskin raincoat

3 plural : an oilskin coat and pants

oink noun : the natural noise of a hog

— oink verb

oint·ment noun : a salve for use on the skin

OJ abbreviation orange juice

Ojib·wa or Ojib·way noun, plural Ojibwa or Ojibwas or Ojibway or Ojibways 1 : a member of an American Indian people of the region around Lake Superior and westward

2 : the Algonquian language of the Ojibwa people

OJT abbreviation on-the-job training

1OK or okay adverb : ALL RIGHT

Synonyms

all right, alright, yea, yes—more at YES

adequately, all right, fine, good, nicely, passably, satisfactorily, so-so, tolerably, well—more at WELL

2OK or okay adjective : ALL RIGHT

Synonyms

acceptable, adequate, all right, decent, fine, passable, respectable, satisfactory, tolerable—more at ADEQUATE

agreeable, all right, alright, fine, good, palatable, satisfactory—more at SATISFACTORY

3OK or okay verb OK'd or okayed; OK'·ing or okay·ing 1 : to give formal or official sanction to : APPROVE, AUTHORIZE

2 : to have or express a favorable opinion of

Synonyms

[1] approve, authorize, clear, ratify, sanction, warrant—more at APPROVE

[2] accept, approve, care, countenance, favor, subscribe

4OK or okay noun : an act or instance of approving

Synonyms

approbation, approval, blessing, favor, imprimatur—more at APPROVAL

5OK abbreviation Oklahoma

Okla abbreviation Oklahoma

okra noun : a tall annual plant related to the mallows that has edible green pods; also : these pods

1old adjective 1 : ANCIENT; also : of long standing

2 cap : belonging to an early period

3 : having existed for a specified period of time

4 : of or relating to a past era

5 : advanced in years

6 : showing the effects of age or use

7 : no longer in use

8 : having been previously

— old·ish adjective

Synonyms

[4] age-old, ancient, antediluvian, antique, dateless, hoary, venerable—more at ANCIENT

[5] ancient, elderly, geriatric, senior—more at ELDERLY

[8] erstwhile, former, late, onetime, past, sometime, whilom—more at FORMER

2old noun : old or earlier time

old·en adjective : of or relating to a bygone era

1old–fashioned adjective 1 : of, relating to, or characteristic of a past era

2 : adhering to customs of a past era : CONSERVATIVE

Synonyms

[1] antique, old-time, quaint; also antiquated, obsolete, historic, historical, olden, traditional; outdated, outmoded, out-of-date, outworn, passé; dated, fusty, musty; aged, age-old, ancient, antediluvian, hoary, venerable; bygone, erstwhile, former, late, past; forgotten, remote; ageless, dateless; timeless

Antonyms

contemporary, hot, mod, modern, newfangled, new-fashioned, ultramodern

[2] conservative, orthodox, reactionary, traditional—more at CONSERVATIVE

2old–fashioned noun : a cocktail usu. made with whiskey, bitters, sugar, a twist of lemon peel, and water or soda water

old–growth adjective : of, relating to, or being a forest with large old trees, numerous snags and woody debris, and a multilayered canopy

old guard noun, often cap O&G : the conservative members of an organization

old hat adjective 1 : OLD-FASHIONED

2 : STALE, TRITE

old·ie noun : something old; especially : a popular song from the past

old–line adjective 1 : ORIGINAL, ESTABLISHED

2 : adhering to old policies or practices

old maid noun 1 : SPINSTER

2 : a prim fussy person

old–maid·ish adjective : characteristic of an old maid

Synonyms

choosy, dainty, delicate, demanding, exacting, fastidious, finicky, fussy, nice, particular, picky—more at FINICKY

old man noun 1 : HUSBAND

2 : a male parent : FATHER

old–school adjective : adhering to traditional policies or practices

old·ster noun : an old or elderly person

Synonyms

ancient, elder, golden-ager, senior citizen—more at SENIOR CITIZEN