What is the meaning of þing?

assembly, meeting, council

parliament

assembly, council

thing

matter, concern

event, meeting, court

case

reason

means

R. D. Fulk (2014) An Introductory Grammar of Old English, published 2020, page 104:

As for g after n, this is affricated, like c, only after i or a vowel that has undergone front mutation, as with nom.-acc. sg. þinġ ‘thing’ and menġan ‘mingle’ (from *mangjan); but affrication after -in- is prevented by a following back vowel: cf. singan. Presumably affrication also failed in nom.-acc. pl. þing < *þingu, but it may have been restored by analogy, though this cannot be known for certain.

a legal assembly

  1. thing, a regional parliament of nearby clans, traditionally headed by an elected jarl
  2. a multi-regional parliament, with representatives from several þing

thing, a regional parliament of nearby clans, traditionally headed by an elected jarl

a multi-regional parliament, with representatives from several þing

a tryst

Source: wiktionary.org