Tight"en (?), v. t. [imp. & p. p. Tightened (?); p. pr. & vb. n. Tightening.]
To draw tighter; to straiten; to make more close in any manner.
Just where I please, with tightened rein
I'll urge thee round the dusty plain.
Tightening pulley Mach., a pulley which rests, or is forced, against a driving belt to tighten it.
© Webster 1913.