SIL
Son-in-law
Example

SIL means son-in-law
Related Slang
Usage
Last Updated: April 4, 2018
Sister-in-law
SIL is an acronym that stands for "sister-in-law" and is typically used in text messages, emails, and chatrooms. The acronym refers to the sister of a partner's spouse or wife of a sibling.
MIL, FIL, DIL, and BIL are also used to refer to "in-law" relations. SIL may also stand for "son-in-law" so the context in which the acronym is used will indicate if it is referring to "son" or "sister."
Example

SIL means sister-in-law
Related Slang
Usage
Last Updated: April 4, 2018
SIL is an acronym that stands for "son-in-law" and is typically used in emails, chatrooms, and text messages. The acronym refers to a husband's relation to his partner's parents.
MIL and FIL are used to refer to the parents of the SIL's partner. SIL may also stand for "sister-in-law" so the context in which the acronym is used will indicate if it is referring to "son" or "sister."