When something is back, it might mean that it has returned, reappeared, or resurfaced. Alternatively, it could suggest that it has been reinstated or reintroduced. Other synonyms for are back include are restored, have made a comeback, have re-emerged, and have returned to the fold. Additionally, the phrase could signify that something has been revived or reanimated. Whatever the connotation may be, the idea of something being back generally implies a sense of nostalgia, hope, or comfort, as we are often excited to see things return once they've been absent for some time.