Boyd’s Bible Dictionary:
“Save, we pray”
(Psa. 118:25-26). The cry when Christ entered Jerusalem (Matt. 21:9-15; Mark 11:9-10).
Concise Bible Dictionary:
This word, which is the same in the Greek, is considered to be a compound of two Hebrew words, and signifies “save now,” as in Psalm 118:25. In the New Testament the sense appears to be “bestow blessing.” “Bestow blessing on the Son of David: bestow blessing [O thou who art] in the highest” (Matt. 21:9; Mark 11:9-10; John 12:13).
Strong’s Dictionary of Greek Words:
Meaning:
of Hebrew origin (3467 and 4994); oh save!; hosanna (i.e. hoshia-na), an exclamation of adoration
Jackson’s Dictionary of Scripture Proper Names:
save, I beseech thee