An "affidavit" is a written declaration under oath, made without notice to the adverse party.
§ 26-1-1001, MCA
En. Sec. 3321, C. Civ. Proc. 1895; re-en. Sec. 7988, Rev. C. 1907; re-en. Sec. 10632, R.C.M. 1921; Cal. C. Civ. Proc. Sec. 2003; re-en. Sec. 10632, R.C.M. 1935; R.C.M. 1947, 93-1601-2.