What is the meaning of this figure of speech?: "I'm tired of bein on the road, lonely as a robin in the rain."I know this is a simile, but what...

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In the first part
of your quote "tired of being on the road," the road isn't necessarily literal. Often,
the road represents a journey or a travel. The author might be tired of a physical
travel, but it could also be a metaphorical travel. The author might be tired of a
mental journey or a trying time in his/her life.

The second part
of your quote, "lonely as a robin in the rain," leads me to believe the author is
referring to a metaphorical travel. Rain often symbolizes the dark and difficult times
in our lives. If we look at the literal side of this section, birds can't fly very well
in the rain. The water adds weight and causes their wings to fail. A robin caught out in
a rain storm without selter would probably be alone. The other birds and animals would
have sought shelter. The author of this quote is saying that he/she is tired of being
alone during a difficult time in their life.

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