1. adjective /ˈsɒri,ˈsɑri,ˈsɔri/
a) Regretful for an action; grieved or saddened, especially by the loss of something or someone.
I am sorry I stepped on your toes. It was an accident.
I am sorry to hear of your uncles death.
Syn: apologetic, attritional, compunctious, contrite, heavyhearted, melancholy, mournful, penitent, penitential, regretful, remorseful, repentant, sad, unhappy
2. interjection /ˈsɒri,ˈsɑri,ˈsɔri/
a) Expresses regret, remorse, or sorrow.
Sorry! I didnt see that you were on the phone.
b) Used as a request for someone to repeat something not heard or understood clearly.
Sorry? What was that? The phone cut out.
3. noun /ˈsɒri,ˈsɑri,ˈsɔri/
The act of saying sorry; an apology.
The British would do it standing stock still, Latinos would dance their sorries, and Canadians would find a way to apologize on ice.
Wikipedia foundation.