英単語辞書 | 単語の意味、定義、例文
To celebrate or keep a religious or other festival.
"The day is observed annually to raise awareness."
a person who watches or notices something
"The observer took notes during the meeting."
An idea, thought, or concern that continually preoccupies or intrudes on a person's mind.
"His obsession with success drove him to work day and night."
Relating to or characterized by an obsession; thinking about something too much.
"He has an obsessive interest in cleanliness."
A hard, dark, glasslike volcanic rock formed by rapid solidification of lava.
"The knife was made from sharp obsidian."
The state of being no longer useful or in fashion; becoming outdated.
"The rapid obsolescence of smartphones makes people upgrade frequently."
Becoming outdated or on the way to becoming obsolete.
"The obsolescent technology could not compete with modern devices."
No longer in use or out of date.
"Floppy disks are now completely obsolete."
something that blocks your way or prevents progress
"Lack of money was the main obstacle to his success."
Things that block one's way or prevent or hinder progress.
"Obstacles in life can often lead to valuable lessons."
A doctor specializing in pregnancy, childbirth, and women's reproductive health.
"The obstetrician monitored the mother’s health throughout the pregnancy."
The branch of medicine dealing with childbirth and care of women giving birth.
"She is studying obstetrics to become a specialist in childbirth."
Stubborn refusal to change one’s opinion or course of action.
"Her obstinacy made it impossible to reach an agreement."
Refusing to change one’s opinion or behavior despite persuasion.
"The child was obstinate about not eating vegetables."
Noisy and difficult to control.
"The obstreperous students disrupted the class."
To block or prevent movement, progress, or action.
"A fallen tree obstructed the road."
Something that blocks or gets in the way; the action of obstructing.
"There was an obstruction on the railway track."
a person who deliberately delays or prevents progress by being uncooperative or oppositional
"The obstructionist in the committee kept delaying the decision-making process."
deliberately creating difficulties or preventing progress; hindering or blocking something
"The obstructive policies hindered economic growth."
to get, acquire, or secure something
"She managed to obtain a scholarship for her studies."
to force oneself or one's ideas into a situation uninvited or inappropriately
"He didn’t want to obtrude into their private conversation."
noticeable in an unpleasant or unwelcome way; intrusive
"The advertisement was so obtrusive that it ruined the user’s experience."
slow to understand; annoyingly insensitive; also refers to an angle greater than 90° and less than 180°
"He was too obtuse to realize the insult."
To turn something so as to face in a different direction; in logic, to convert a proposition by negating both subject and predicate.
"The teacher asked the students to obvert the statement for practice."
To remove a need or difficulty; to prevent or avoid something.
"This new system obviates the need for manual data entry."
easily perceived or understood; clear and apparent
"It was obvious that she was upset after the meeting."
in a way that is easily perceived or understood; clearly
"Obviously, he didn’t read the instructions."
A particular time or event; a special or important happening.
"Her wedding was a joyful occasion for the whole family."
happening or done sometimes but not regularly or often
"He makes occasional visits to his hometown."
from time to time; now and then
"I occasionally go for a walk in the park."
The countries of the West, especially Europe and America.
"The Occident has a long history of philosophical thought."
To block or close up an opening or passage.
"The pipe was occluded by mineral deposits."
Relating to mysterious, supernatural, or magical powers and practices.
"She had always been fascinated by the occult and its hidden knowledge."
A person who resides in or is present in a house, vehicle, seat, or place.
"The car had three occupants at the time of the accident."
a job or profession; the action or state of occupying a place
"Her occupation is a teacher at a local school."
being in use or taken; filled or lived in; controlled or held by force
"The room is occupied, so please wait outside."
to take control or possession of a place or thing
"The workers will occupy the building until the renovations are completed."
to happen or take place
"The event occurred last night at the hall."
An incident, event, or something that happens.
"The occurrence of such storms is rare in this region."
Happens or takes place, especially as a result of something.
"Snowfall occurs in regions with freezing temperatures."
a large body of salt water that covers most of the Earth's surface
"The ocean is vast and mysterious."
The ongoing decrease in the pH of the Earth's oceans, caused by the absorption of carbon dioxide from the atmosphere.
"Ocean acidification is caused by atmospheric CO2 absorption."
The formation of layers in ocean water due to differences in density.
"Ocean stratification affects marine biodiversity."
A polygon with eight sides and eight angles.
"The stop sign is shaped like an octagon."
A size of book page resulting from folding a sheet of paper into eight leaves (sixteen pages).
"The old library contained rare octavo editions of Shakespeare."
the tenth month of the year in the Gregorian calendar
"The weather becomes cooler in October."
A person who is between 80 and 89 years old.
"The octogenarian still jogs every morning to stay healthy."
Relating to the eye or vision.
"The patient was referred to a specialist for ocular treatment."
