| SON | (of speed) having or caused by speed approximately equal to that of sound in air at sea level |
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| SON | the increase in aerodynamic drag as an airplane approaches the speed of sound |
| SON | an explosive sound caused by the shock wave of an airplane traveling faster than the speed of sound |
| SON | a delay line based on the time of propagation of sound waves |
| SON | depth finder for determining depth of water or a submerged object by means of ultrasound waves |
| SON | a verse form consisting of 14 lines with a fixed rhyme scheme |
| SON | compose a sonnet |
| SON | praise in a sonnet |
| SON | a poet who writes sonnets |
| SON | a male child (a familiar term of address to a boy) |
| SON | a male child (a familiar term of address to a boy) |
| SON | United States prizefighter who lost his world heavyweight championship to Cassius Clay in 1964 (1932-1970) |