empty air; sky
Refers to the physical empty space or the sky. Often used in compound words or literary contexts.
A bird is flying through the air.
emptiness; shunyata
Buddhist term for the concept of emptiness, the lack of intrinsic nature in all phenomena.
fruitlessness; meaninglessness
Describes something as empty, futile, or without substance. Can be used as a noun or adjectival noun.
His efforts ended in futility.
One of the five elements (五大) in traditional Japanese philosophy, representing void or space.
See also: 五大
noun which may take the genitive case particle 'no'
Mathematical term for an empty set or empty condition.
In Buddhism, the concept of emptiness is important.
My dream is to become an air force pilot.
As one of the five elements, void represents space.
The empty set has no elements.
space; room; airspace
airport
aviation; flying
in the air; midair; sky
aircraft carrier
sky; the skies; upper air
air force
fictitious; imaginary; fabricated · aerial; overhead
empty stomach; hunger
spacetime; space-time
vacuum · absolute void; complete vacuity
sky; heavens; firmament
daydream; fantasy; fancy; vision
blank space; blank area · blank; void; gap; vacuum · whitespace
air raid; aerial attack
aerial bombing; air raid
air conditioning
anti-aircraft
Sun Wukong; Monkey King · Son Goku
empty seat; unoccupied seat · vacancy; vacant post; unfilled position
cavity; hollow; cavern · hollow; cavernous
emptiness; hollowness; void · inanity; pointlessness; meaninglessness
air defense
low altitude; low sky
unprecedented; record-breaking
air cooling
territorial airspace
airborne
airspace
Standard kanji spelling for the reading くう. Used across all senses.
The kanji 空 represents 'sky' or 'empty'. The reading くう is the on'yomi, used in many compound words. The Buddhist sense derives from the Sanskrit concept of śūnyatā.