This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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verb-intransitive. To slip by; pass: Weeks elapsed before we could start renovating.

n. Passage; lapse: met again after an elapse of many years.

v. To pass or move by.

verb-intransitive. To slip or glide away; to pass away silently, as time; -- used chiefly in reference to time.

To slide, slip, or glide away; pass away with or as if with a continuous gliding motion: used of time.

To pass out of view or consideration; suffer lapse or neglect.

n. The act of passing; lapse.

v. pass by

"In addition, a certain time must elapse from the injection of the serum until its antitoxic and healing activity in the affected parts of the body can develop."

elapsed    elapses    elapsing   

progress    pass on    move on    march on    go on    advance   

fell    fly    vanish   

elapsed    elapsing   

passing   

Japs    Lapps    apps    caps    chaps    claps    collapse    craps    flaps    gaps