Lexical Definition

‎מָחָר‎ mâchâr (maw-khar') tomorrow ^H:N-M
probably from ‎אָחַר‎

time to come, tomorrow.

• properly, deferred, i.e. the morrow
• usually (adverbially) tomorrow
• indefinitely, hereafter

1) tomorrow, in time to come, in the future
1a) tomorrow (as the day following the present day)
1b) in future time

See Greek: αὔριον · ἐπαύριον

Brown-Driver-Briggs

‎מָחָר‎₅₂ noun masculine, used often as adverb, tomorrow, in time to come (Aramaic ‎מְחַר‎ ; probably properly time in front, Kö^{ii. 263}, compare √, and Assyrian ma—ru, front, often of time, though always of former time, of old, Dl^{HWB 402}); —

1. to-morrow (the day following the present day),
a. as substantive Exod 16:23 ‎מָחָר‎ ‎׳‎‎שַׁבָּתוֺן שַׁבַּת קֹדֶשׁ לְי‎ to-morrow is a sabbath, etc., 1Sam 20:5 ‎חֹדֶשׁ מָחָר‎ to-morrow is the new moon, v1Sam 20:18 in ‎יוֺם מָחָר‎ Gen 30:33; Prov 27:1; Isa 56:12 in the idiomatic phrase ‎כָּעֵת מָחָר‎ at the like of the time, (being) to-morrow, = about to-morrow (see ‎כְּ‎ 1 a) Exod 9:18; 1Sam 9:16; 1Sam 20:12; 1Kgs 19:2; 1Kgs 20:6; 2Kgs 7:1; 2Kgs 7:18; 2Kgs 10:6 and in ‎לְמָחָר‎ Exod 8:19* ‎לְמָחָר יִהְיֶה הָאֹת הַזֶּה‎, = for, against, to-morrow, Exod 8:6*; Num 11:18; Josh 7:13; Esth 5:12.
b. as adverb accusative Exod 8:25*; Exod 9:5 ‎מָחָר יַעֲשֶׂה‎ ‎הַדָּבָר הַזֶּה‎ ‎׳‎‎י‎, Exod 10:4 ‎הִנְנִי מֵבִיא מָחָר אַרְבֶּה‎, Exod 17:9; Exod 32:5; Num 14:25; 1Sam 11:9 etc., Josh 11:6 ‎מָחָר כָּעֵת הַזּאֹת‎; opposed to ‎הַיּוֺם‎ Exod 19:10 ‎הַיּוֺם וּמָחָר‎, Josh 22:18; 2Sam 11:12a; rhetorically, Isa 22:13 ‎כִּי מָחָר נָמוּת‎.

2. = in future time, Exod 13:14 ‎כִּי יִשְׁאָֽלְךָ בִנְךָ מָחָר לֵאמֹר‎ = Deut 6:20; Josh 4:6; Josh 4:21; Josh 22:24; Josh 22:27; Josh 22:28 so ‎בְּיוֺם מָחָר‎ Gen 30:33.

Brown-Driver-Briggs References