What is the meaning of ?

Sa, a letter of the Thai script.

The 38th letter and 30th consonant of the Thai Pali alphabet. In Pali it represents the voiceless, sibilant fricative consonant /s/.

Thai script form of sa, which is masculine nominative singular of (ta, that)

Thai script form of sa, which is masculine nominative singular of (ta, he, it)

Thai script form of sa, which is vocative singular of สนฺ (san, dog)

sɔ̌ɔ sʉ̌ʉa (เสือ), the 40th consonant letter of the Thai alphabet

Source: wiktionary.org