1. Intellectually or emotionally overwhelming
   "a mind-boggling display"; "a mind-boggling puzzle"

See also: impressive

• semiminor axis
• semimonthly
• seminal
• seminal duct
• seminal fluid
• seminal vesicle
• seminar
• seminarian
• seminarist
• seminary
• seminate
• seminiferous
• seminiferous tubule
• Seminole
• Seminole bread
• seminoma
• seminude
• semiofficial
• semiology
• semiopaque
• semiotic
• semiotical
• semiotician
• semiotics
• semiparasite