definition of
[stand by]

[1] #1 stand by v. not act or do anything; "He just stood by when the police beat up the demonstrators". wn

[2] #2 stand by v. be available or ready for a certain function or service. wn

[3] #3 stand by v. be loyal to; "She stood by her husband in times of trouble"; "The friends stuck together through the war". wn