1. sp - Noun
2. sp - Verb
3. Sp - Proper noun
(horse racing, chiefly Australia) Starting price.
Selling price
(US, military, navy) Shore patrol
(law enforcement) state police
Slow play
(computing) service pack
(law enforcement) Abbreviation of superintendent.
(Scientology) Initialism of suppressive person.
(biochemistry) substance P
(firearms) Abbreviation of soft point.
State Park
(highways) Spur
(ice skating) Short Program
(Hong Kong) Initialism of sex partner.
SP
Initialism of São Paulo, A state of Brazil.
Abbreviation of spelling. (often used when correcting or questioning one's own spelling)
Abbreviation of spur. (in highway designations and signage)
Abbreviation of special. (Can we add an example for this sense?)
(typography) Abbreviation of space.
sp
(proofreading) Abbreviation of spell out.
Spanish (language)
September
Source: en.wiktionary.org