from The American Heritage® Dictionary of the English Language, 4th Edition
- adv. From then until now or between then and now: They left town and haven't been here since.
- adv. Before now; ago: a name long since forgotten.
- adv. After some point in the past; at a subsequent time: My friend has since married and moved to California.
- prep. Continuously from: They have been friends since childhood.
- prep. Intermittently from: She's been skiing since childhood.
- conj. During the period subsequent to the time when: He hasn't been home since he graduated.
- conj. Continuously from the time when: They have been friends ever since they were in grade school.
- conj. Inasmuch as; because: Since you're not interested, I won't tell you about it.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adv. From a specified time in the past.
- prep. From (time).
- conj. from the time that
- conj. because
from the GNU version of the Collaborative International Dictionary of English
- adv. From a definite past time until now.
- adv. In the time past, counting backward from the present; before this or now; ago.
- adv. When or that.
- prep. From the time of; in or during the time subsequent to; subsequently to; after; -- usually with a past event or time for the object.
- conj. Seeing that; because; considering; -- formerly followed by that.
from The Century Dictionary and Cyclopedia
- After that; from then till now; from a specified time in the past onward; continually afterward; in or during some part of a time between a specified past time and the present; in the interval that has followed a certain event or time; subsequently.
- Before now; ago: with an adverbial phrase specifying the amount of time separating the event or time in question from the present: as, many years since; not long since.
- Ever from the time of; throughout all the time following; continuously after and from; at some or any time during the period following; subsequently to.
- From the time when; in or during the time after.
- When: after verbs noting knowledge or recollection.
- As a sequel or consequence of the fact that; inasmuch as; because.
- Synonyms Because, Since, As, Inasmuch as, For. Because (originally by cause) is strong and the most direct. Since, starting from the idea of mere sequence in time, is naturally less emphatic as to causation: its clause more often precedes the main proposition. As is still weaker, and, like since, generally brings in the reason before the main proposition: as or since the mountain will not come to Mohammed, Mohammed must go to the mountain. Inasmuch as is the most formal and emphatic, being used only to mark the express reason or condition. For follows the main proposition, and generally introduces that which is really continuative of the main proposition and of equal or nearly equal importance, the idea of giving a reason being subordinate.
Middle English sinnes, contraction of sithenes : sithen, since (from Old English siththan : sīth, after + than variant of thām, dative of thæt, that; see that) + -es, adv. suff.; see -s3.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English syns, sinnes, contraction of earlier sithens, sithence, from sithen ("after", "since") ( + -s, adverbial genitive suffix), from Old English sīþþan, from the phrase sīþ þǣm ("after/since that (time)"), from sīþ ("since", "after") + þǣm dative singular of þæt. Cognate with Dutch sinds ("since"), German seit ("since"), Danish siden ("since"). (Wiktionary)