any of various nonmetallic minerals (calcite or feldspar) that are light in color and transparent or translucent and cleavable
"The geologist carefully examined the clear, glassy fragments to confirm they were samples of spar found deep within the limestone formation."
a stout rounded pole of wood or metal used to support rigging
"The crew had to climb up the main spar to secure the loose shrouds before the storm hit."
A rafter of a roof.
"The geologist carefully chipped away at the spar to reveal its delicate internal crystal structure."
A sparring session; a preliminary fight, as in boxing or cock-fighting.
Any of various microcrystalline minerals, of light, translucent, or transparent appearance, which are easily cleft.
furnish with spars
"The shipwright spent weeks building the hull before she could begin to spar it for the upcoming voyage across the Atlantic."
box lightly
"The two young boxers decided to spar lightly before their official match later that evening."
to bolt, bar.
"The two boxers stepped into the ring to spar and sharpen their techniques before the main event."
To fight, especially as practice for martial arts or hand-to-hand combat.