1. by surprise; unexpectedly (used in the phrase ‘taken aback’)
Usage: typically used in the phrase ‘taken aback’
2. backward; toward the back
Usage: nautical; archaic

Examples

• She was taken aback by his rude comment.
• The unexpected news left him completely taken aback.
• I was taken aback when she suddenly resigned.
• The teacher was taken aback by the student’s brilliant answer.
• We were all taken aback by the generous donation.
• The sailor stepped aback to avoid the swinging boom.