since

/sɪns/
adverb
  1. From a past time until the present time.
    • I saw him last week, but I haven't spoken to him since.
    • The company was founded in 1990 and has grown a lot since.
    • She left in 2010 and has not returned since.
conjunction
  1. From a past event or time until now.
    • He has been happy since he moved to the city.
    • They have been friends since they were children.
    • I haven't seen her since we graduated.
  2. Because; for the reason that.
    • Since she asked nicely, I helped her.
    • Since it's raining, we'll stay inside.
    • Since you are tired, you should rest.
Synonyms
preposition
  1. From a past time until now.
    • She has been studying English since last year.
    • I have lived here since 2015.
    • The store has been closed since Tuesday.
Antonyms
What does "since" mean? | whatsthatwordmean | whatsthatwordmean