Summarize vs. Summarise: What's the Difference?

Summarize and Summarise Definitions
Summarize
To make a summary or make a summary of.
Summarise
(British spelling) summarize.
Summarize
(ambitransitive) To prepare a summary of (something).
Jim was asked to summarize the document by Wednesday.
Summarise
Be a summary of;
The abstract summarizes the main ideas in the paper
Summarize
(ambitransitive) To give a recapitulation of the salient facts; to recapitulate or review.
After the meeting, Jim summarized the major decisions made.
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Summarise
Give a summary (of);
He summed up his results
I will now summarize
Summarize
To comprise in, or reduce to, a summary; to present briefly.
Summarize
Give a summary (of);
He summed up his results
I will now summarize
Summarize
Be a summary of;
The abstract summarizes the main ideas in the paper