| ALT | effects (as nosebleed or nausea) of oxygen deficiency in the blood and tissues at high altitudes |
|---|---|
| ALT | pertaining to altitude |
| ALT | indefinitely high |
| ALT | the pitch range of the lowest female voice |
| ALT | the highest adult male singing voice |
| ALT | the lowest female singing voice |
| ALT | a singer whose voice lies in the alto clef |
| ALT | (of a musical instrument) second highest member of a group |
| ALT | of or being the highest male voice |
| ALT | of or being the lowest female voice |
| ALT | a clef that puts middle C on the third line of a staff |
| ALT | a sculptural relief in which forms extend out from the background to at least half their depth |