est.
adjective
估计;估算;估价（estimated 或 estimate的缩写）
written abbreviation for estimated
the town of Brownford (est. population 14,000) 布朗福德镇（估计人口14000人）
建立于;设立于;创立于（established的缩写）
written abbreviation for established: used with a date to show when a company or organization was begun
P. R. Jones & Co, Est. 1920 P.R.琼斯公司，创立于1920年