noun
largest number; plurality
Refers to the greatest quantity or the largest group, often in contexts like voting, statistics, or comparisons.
この選挙では、彼が最多数の票を獲得した。
In this election, he won the largest number of votes.
最多数の意見が採用された。
The opinion with the most support was adopted.
最大 means 'maximum' or 'largest' in a general sense, while 最多数 is specifically about numerical count.
Compound of 最 (sai, 'most') + 多数 (tasū, 'large number'). The reading さいたすう follows standard on'yomi.