100 entries under idiom topic. ×

8
at sea(noun, expression, adjective, doubtful)
6
down the drain(expression, adjective, split, lacking)
5
deep in thought(expression, adjective, thoughtful, involved)
3
lost in thought(expression, adjective, thoughtful, distracted)
3
out the window(expression, adjective, split, quit)
2
gone astray(expression, adjective, confused, out)
2
in a reverie(expression, inattention)
2
in the clouds(expression, inattention)
2
lost to sight
2
without a clue(expression, confused, perplexed, bewildered)
2
wrapped in thought(expression, inattention)
1
all wound up(expression, adjective, absorbed, occupied)
1
at a loss(expression, confused, perplexed, bewildered)
1
by the board
1
caught up in(expression, absorbed, inattentive, engaged)
1
down memory lane(expression, adjective, dead, past)
1
failed to win
1
fallen between cracks(expression, adjective, confused, out)
1
get lost
1
get on credit(verb, expression, incur, owe)
10 years ago|29k views|share |citing 
APASmart Define. (2016). lost thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/lost/thesaurus/synonyms
ChicagoSmart Define. 2016. "lost thesaurus" https://smartdefine.org/lost/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, lost thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/lost/thesaurus/synonyms>.
MLASmart Define. "lost thesaurus" 17 February 2016. Web. 21 September 2026. <https://smartdefine.org/lost/thesaurus/synonyms>