This meaning refers to controlled fighting practice used to improve skill and fitness.
The boxers sparred for three rounds.
She spars with a training partner twice a week.
This figurative meaning refers to exchanging arguments, criticism, or witty remarks.
The candidates sparred over economic policy.
They often spar playfully at meetings.
This technical meaning refers to a strong structural pole or beam in ships, aircraft, or buildings.
The sail was attached to a wooden spar.
The aircraft wing contains a main spar.