running out of gasoline (petrol)
failure to pay one's compliments; omission of courtesy
oxygen deficiency; oxygen shortage; lack of oxygen
filling a vacancy; supplementation; substitute; deputy; alternate
having no money; lack of money
absence due to illness; sick leave
intermittence; intermittent
authorized absence; permission of absence from class(es)
removal; omission; lusting
fragment (e.g. of works); incomplete set; incomplete state
omission of a character; omitted character; blank type; insertion of blank spaces before and after the names of dignitaries (as a sign of respect)
missing issue (of magazine)
missing part (of manuscript)