Definition of "SE"

SE

noun
plural SEs
1. Abbreviation of southeast.
2. Initialism of second edition.
3. Initialism of special edition.
4. (computing) Initialism of standard edition.
5. (aerospace) Initialism of sustainer engine.
6. (physics) Initialism of secondary electron.
7. (train control) Initialism of STM European.
proper noun
usually uncountable, plural SEs
1. Initialism of Stack Exchange.
adjective
1. Initialism of single ended.
2. Abbreviation of southeast.