Quick Definition
unable to speak
Strong's Definition
mute
Derivation: from G1 (Α) (as a negative particle) and G2980 (λαλέω);
KJV Usage: dumb
Thayer's Greek Lexicon
ἄλαλος, (λάλος, talking, talkative) (from Aeschylus on), speechless, dumb, lacking the faculty of speech: Mar_7:37; πνεῦμα, Mar_9:17; Mar_9:25, because the defects of demoniacs were thought to proceed from the nature and peculiarities of the demons by which they were possessed. (the Sept. Psa_37:14 (); Psalm 30:19 (); ἀλάλου καί κακοῦ πνεύματος πλήρης, Plutarch, de orac. def. 51, p. 438 b.)
Mounce Concise Greek Dictionary
ἄλαλος alalos 3x
unable to speak or artilculate, Mar_7:37 ; Mar_9:17 ; Mar_9:25
Abbott-Smith Greek Lexicon
ἄ -λαλος , -ον
( < λάλος , talkative ),
[in LXX : Psa_31:18 ( H481 ni .) Psa_38:13 ( H483 ) * ;]
dumb, speechless: Mar_7:37 ; Mar_9:17 ; Mar_9:25 . †
Liddell-Scott — Intermediate Greek Lexicon
ἄλαλος "speechless", NTest.
STEPBible — Tyndale Abridged Greek Lexicon
ἄ-λαλος, -ον
(λάλος, talkative), [in LXX: Psa.31:18 (אָלַם ni.) Psa.38:13 (אִלֵּם)* ;]
dumb, speechless: Mrk.7:37 9:17, 25.†
(AS)