Preengage v. t. (past & past part. preengaged; pres. part. preengaging) To engage by previous contract; to bind or attach previously; to preoccupy. "But he was preengaged by former ties."
... that I would help you with him. I might be elsewhere occupied. Last night I entertained myself with imaging A project which, if I adopted it, Would preengage me. ... — Mr. Faust • Arthur Davison Ficke
...
