airspace incursion; airspace violation

to violate airspace

an airplane, aeroplane / (obsolete) Clipping of 空中飛行機 (kūchū hikōki): a flying machine

permission, consent from someone / a legal permit, legal permission

to permit, to allow / to grant legal permission

airspace

violation (of foreign territory, rights, etc.); invasion; infringement

to violate (foreign territory, rights, etc.); to invade; to infringe

nothing, nothingness / (Buddhism) mu; the null set: neither yes nor no (in response to a koan or other question that mistakenly assumes an affirmative or negative answer).

a paper aeroplane