1. in a way that causes doubt or mistrust; in a manner suggesting something is wrong or dishonest
2. in a way that shows suspicion or distrust of others

Examples

• The car was parked suspiciously close to the bank.
• She looked at him suspiciously when he claimed to be working late.
• The deal seemed suspiciously good to be true.
• He glanced around suspiciously before entering the building.
• The witness acted suspiciously during questioning.
• The package arrived suspiciously quickly.
• She eyed the stranger suspiciously from across the room.