Lexical Definition

‎מֵישָׁר‎ mêyshâr (may-shawr') uprightness H:N-M
from ‎יָשַׁר‎

agreement, aright, that are equal, equity, (things that are) right(-eously, things), sweetly, upright(-ly, -ness).

1) evenness, uprightness, straightness, equity
1a) evenness, level, smoothness
1b) uprightness, equity
1c) rightly (as adv)

See Greek: δικαιοσύνη · εὐθέως · εὐθύς

Usage: 10 forms in 19 verses
Form Translated As     In Verse(s)
מֵישָׁרִֽים uprightness Ps.17.2Prov.8.6Prov.23.16Isa.45.19
מֵישָׁרִ֥ים uprightness Ps.58.1Ps.75.2
מֵישָׁרִ֖ים uprightness Song.1.4
מֵישָׁרִ֑ים uprightness Ps.99.4Dan.11.6
מֵֽישָׁרִ֑ים level paths Isa.26.7
uprightness Isa.33.15
לְמֵישָׁרִ֑ים to smoothness Song.7.9
וּמֵישָׁרִֽים and uprightness Prov.1.3
וּמֵישָׁרִ֖ים and uprightness 1Chr.29.17
וּ֝מֵישָׁרִ֗ים and uprightness Prov.2.9
בְּמֵישָׁרִֽים with smoothness Prov.23.31
with uprightness Ps.9.8Ps.96.10Ps.98.9

Brown-Driver-Briggs

[‎מֵישָׁר‎] noun masculine evenness, uprightness, equity; — only plural: ‎מֵשָׁרִים‎ Prov 1:3 elsewhere ‎מֵישָׁרִים‎ Isa 26:7 + 17 t.; —

1. evenness, level Isa 26:7, of path of righteous (in the future), figurative for free from difficulties; smoothness, of the flow of wine, ‎׳‎‎בְּמ‎ Prov 23:31 ‎׳‎‎למ‎ Song 7:10*.

2. in ethical sense, uprightness, equity, as taught in the school of wisdom Prov 8:6, || ‎צֶדֶק‎ Prov 1:3; Prov 2:9 of government ‎׳‎‎(ב)מ‎ Ps 9:9*; Ps 58:2*; Ps 75:3*; Ps 96:10; Ps 99:4 of speech Isa 33:15; Prov 23:16 of Yahweh's promises Isa 45:19 ‎׳‎‎רצה מ‎ 1Chr 29:17 have pleasure in equity; ‎׳‎‎עשׂה מ‎ Dan 11:6 make an equitable arrangement.

3. adverb rightly, with ‎חזה‎ Ps 17:2 ‎אהב‎ Song 1:4.

Brown-Driver-Briggs References

Book Refs
1 Chronicles 29:17
Psalms 9:9* · 17:2 · 58:2* · 75:3* · 96:10 · 99:4
Proverbs 1:3 · 2:9 · 8:6 · 23:16 · 23:31
Song of Solomon 1:4 · 7:10*
Isaiah 26:7 · 33:15 · 45:19
Daniel 11:6