Word: upthread
Part of speech: Adjective
Syllables: up
thread
Definition: Previous, or hierarchically higher, in a thread of discussion.
Morphemes:
Affix: up-
Language: en
PoS: Prefix
Meaning: Used to indicate higher position or direction, literally or figuratively.
Affix: thread
Language: en
PoS: Noun
Meaning: A series of messages, generally grouped by subject, in which all messages except the first are replies to previous messages in the thread.