Sideline
/ˈsaɪdˌlaɪn/noun
A line marking the side boundary of a playing field, or a secondary activity or interest.
Did you know?“Sideline” is a straightforward English compound, but its power comes from the ancient symbolic force of the line itself: in many cultures, a boundary wasn’t just a mark — it was a rule, a limit, a threshold.
Etymological Timeline
Old English
OE
sīd
“Wide, broad, spacious”
Old English
OE
līn
“A line, cord, or measuring string”
Middle English
ME
sideline
“A line at the side; a boundary line”
19th Century
English
sideline
“A line marking the side of a playing field”
Modern English
English
sideline
“A boundary line, or by extension a secondary activity or role”