SINCE 1828
interplanetary
adjective
in·ter·plan·e·tary
| \ ˌin-tər-ˈpla-nə-ˌter-ē
\
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Definition of interplanetary
: existing, carried on, or operating between planets
interplanetary dust an interplanetary flight interplanetary spacecraft
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More Definitions for interplanetary
interplanetary
adjective
English Language Learners Definition of interplanetary
astronomy
: existing or occurring between planets
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