There are 2 definitions of S/S in English:

S/S1

Line breaks: S/S

Entry from British & World English dictionary

abbreviation

British
Spring/summer (denoting or relating to fashion designed for the spring and summer seasons of a particular year): Chanel’s S/S 2013 collection anyone who’s anyone will be wearing Saint Laurent, so start stocking up on the key S/S pieces

Definition of S/S in:

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Word of the day anomalous
Pronunciation: əˈnämələs
adjective
deviating from what is standard, normal, or expected

There are 2 definitions of S/S in English:

s/s2

Syllabification: s/s

abbreviation

Same size.

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Word of the day anomalous
Pronunciation: əˈnämələs
adjective
deviating from what is standard, normal, or expected