I don't want to prolong this definition, so I'll keep it short. To prolong is to make something last longer or to stretch it out in time.

You see the word long in prolong and it's no trick. If you prolong an argument with a sibling, you make it longer than it naturally would be. Prolong always has to do with time. When you stretch your neck or a piece of cloth to make it appear longer, you are elongating, not prolonging, it.

Definitions of prolong

v lengthen in time; cause to be or last longer

“We prolonged our stay”
draw out, extend, protract
carry, extend
continue or extend
prolong the time allowed for payment of
temporise, temporize
draw out a discussion or process in order to gain time
spin, spin out
prolong or extend
Type of:
make longer

v lengthen or extend in duration or space

prolong the treatment of the patient”
keep up, sustain
continue, keep, keep on, retain
allow to remain in a place or position or maintain a property or feature
Type of:
bear on, carry on, continue, preserve, uphold
keep or maintain in unaltered condition; cause to remain or last

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, can put you on the path to systematic vocabulary improvement.