“Seven” From Boyd’s Bible Dictionary:
A favorite, and often symbolic, number among Hebrews
(Gen. 2:2; 7:2; 41:2-3). Used as a round number (1 Sam. 2:5; Matt. 12:45). Type of abundance and completeness (Gen. 4:15,24; Matt. 18:21-22). These references, and other places, show a seventh day and seventh year sabbath and a seven times seventh year of Jubilee; also sacrificial animals limited to seven, and the golden candlesticks. Seven priests with seven trumpets surrounded Jericho for seven days, and seven times on the seventh day. In the Apocalypse we find seven churches, seven candlesticks, seven stars, seven seals, seven trumpets, seven vials, seven plagues, seven angels.
“Week” From Boyd’s Bible Dictionary:
The division of time into weeks of seven days each dates from the earliest historic times among many and wide-apart nations
The Hebrew week began on our Sunday, their Sabbath being the seventh day or Saturday. The only day of their week they named was the Sabbath. The rest ran by numbers, as first, second, third, and so forth. Besides their week of days, Hebrews had their week of years, every seven years, and their week of seven times seven years, or year of jubilee, every fiftieth year (Gen. 8:10; 29:27). The “feast of weeks” corresponded with Pentecost (Ex. 23:15; 34:22; Lev. 23:15-22; Num. 28).
“Seven” From Concise Bible Dictionary:
See NUMBERS AS SYMBOLS.
“Weeks, Seventy” From Concise Bible Dictionary:
See SEVENTY.
Strong’s Dictionary of Hebrew Words:
Transliteration:
shabuwa`
Meaning:
or shabuan {shaw-boo'-ah}; also (feminine) shbu.ah {sheb-oo-aw'}; properly, passive participle of 7650 as a denominative of 7651; literal, sevened, i.e. a week (specifically, of years)